Christopher Long (bicyclist)
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There have been many conflicts during
Critical Mass In nuclear engineering, critical mass is the minimum mass of the fissile material needed for a sustained nuclear chain reaction in a particular setup. The critical mass of a fissionable material depends upon its nuclear properties (specific ...
events since the founding of the worldwide bicycling
advocacy Advocacy is an Action (philosophy), activity by an individual or advocacy group, group that aims to influence decision making, decisions within political, economic, and social institutions. Advocacy includes activities and publications to infl ...
event in 1992. The conflicts have resulted in injuries, property damage, and arrests, and both bicyclists and motorized vehicle drivers have been victims. Critics say that Critical Mass, held primarily in large
metropolitan Metropolitan may refer to: Areas and governance (secular and ecclesiastical) * Metropolitan archdiocese, the jurisdiction of a metropolitan archbishop ** Metropolitan bishop or archbishop, leader of an ecclesiastical "mother see" * Metropolitan ar ...
cities, is a deliberate attempt to obstruct automotive
traffic Traffic is the movement of vehicles and pedestrians along land routes. Traffic laws govern and regulate traffic, while rules of the road include traffic laws and informal rules that may have developed over time to facilitate the orderly an ...
and disrupt normal
city A city is a human settlement of a substantial size. The term "city" has different meanings around the world and in some places the settlement can be very small. Even where the term is limited to larger settlements, there is no universally agree ...
functions, when individuals taking part refuse to obey
traffic laws Traffic is the movement of vehicles and pedestrians along land routes. Traffic laws govern and regulate traffic, while rules of the road include traffic laws and informal rules that may have developed over time to facilitate the orderly and ...
, while participants variously consider it a celebration of cycling, of cyclists' rights, and a practical re-imagining of urban space.


Berkeley, California, US

On May 11, 2007, an incident occurred in
Berkeley, California Berkeley ( ) is a city on the eastern shore of San Francisco Bay in northern Alameda County, California, United States. It is named after the 18th-century Anglo-Irish bishop and philosopher George Berkeley. It borders the cities of Oakland, Cali ...
, when an elderly motorist stopped at an
intersection In mathematics, the intersection of two or more objects is another object consisting of everything that is contained in all of the objects simultaneously. For example, in Euclidean geometry, when two lines in a plane are not parallel, their ...
with dozens of
bicycle A bicycle, also called a pedal cycle, bike, push-bike or cycle, is a human-powered transport, human-powered or motorized bicycle, motor-assisted, bicycle pedal, pedal-driven, single-track vehicle, with two bicycle wheel, wheels attached to a ...
s crossing.
Activists Activism consists of efforts to promote, impede, direct or intervene in social, political, economic or environmental reform with the desire to make changes in society toward a perceived common good. Forms of activism range from mandate build ...
claim that the driver shouted, while bicyclists were in the intersection, "I'm sick of you people!" Police have not determined who had the
right-of-way A right of way (also right-of-way) is a specific route that people, animals, vehicles, watercraft, or utility lines travel, or the legal status that gives them the right to do so. Rights-of-way in the physical sense include controlled-access h ...
. The driver attempted to drive through the intersection. The motorist and his wife, two witnesses, and the police all claimed that the cyclists threw their bicycles under the vehicle. This was disputed by other witnesses. Critical Mass participants then rocked the vehicle, pounded the hood, and broke the windshield while verbally abusing the elderly couple. Approximately $3,000 worth of damage was done to the bicycles. Berkeley police did not make any arrests in the incident.


Buffalo, New York, US

On May 30, 2003, in
Buffalo, New York Buffalo is a Administrative divisions of New York (state), city in the U.S. state of New York (state), New York and county seat of Erie County, New York, Erie County. It lies in Western New York at the eastern end of Lake Erie, at the head of ...
, during an incident known locally as "Critical Massacre," police stopped two cyclists for "failure to yield to an
emergency vehicle An emergency vehicle is a vehicle used by emergency services. Emergency vehicles typically have specialized Emergency vehicle lighting, emergency lighting and Emergency vehicle equipment, vehicle equipment that allow emergency services to reach Ca ...
." Several people were allegedly attacked by police. Nine cyclists were arrested and three were later convicted, including a journalist.


Chicago, Illinois, US

Chicago Police Department The Chicago Police Department (CPD) is the primary law enforcement agency of the city of Chicago, Illinois, United States, under the jurisdiction of the Chicago City Council. It is the second-largest Law enforcement in the United States#Local, ...
officers are often seen riding with Critical Mass participants, and squad cars block intersections to provide safe passage to Critical Mass cyclists. However, on August 31, 2007, seven riders were arrested on charges of obstructing traffic and disobeying police, and were held overnight. According to some of those arrested, they were released late at night or early in the morning. On multiple occasions, Critical Mass participants attempted to ride on
Lake Shore Drive Lake Shore Drive (officially Jean Baptiste Pointe du Sable Lake Shore Drive; also known as DuSable Lake Shore Drive, the Outer Drive, the Drive, LSD or DLSD) is a semi-limited access Limited-access highway, expressway that runs alongside the sh ...
, a road off limits to cyclists. Police prevented participants riding on Lake Shore Drive, by blocking entrance ramps with squad cars when Critical Mass riders approached the road.


Honolulu, Hawaii, US

At dusk on March 28, 2008, in
Honolulu, Hawaii Honolulu ( ; ) is the List of capitals in the United States, capital and most populous city of the U.S. state of Hawaii, located in the Pacific Ocean. It is the county seat of the Consolidated city-county, consolidated City and County of Honol ...
, police collided with a young woman on a bicycle while trying to stop another bicyclist for traffic infractions. The young woman fell and hit her head on the ground, sustaining injuries requiring hospitalization. While no arrests were made, the police did issue
citations A citation is a reference to a source. More precisely, a citation is an abbreviated alphanumeric expression embedded in the body of an intellectual work that denotes an entry in the bibliographic references section of the work for the purpose o ...
and confiscated bicycles.


Houston, Texas, US

Due to the gradual increase of cyclists participating in Critical Mass, as well as complaints from motorists and concerns for safety,
Houston Police Department The Houston Police Department (HPD) is the primary municipal law enforcement agency serving the city of Houston, Texas, United States, and some surrounding areas. With approximately 5,300 officers and 1,200 civilian support personnel it is the fi ...
officers helped direct the October 2013 Critical Mass ride in
Houston, Texas Houston ( ) is the List of cities in Texas by population, most populous city in the U.S. state of Texas and in the Southern United States. Located in Southeast Texas near Galveston Bay and the Gulf of Mexico, it is the county seat, seat of ...
by controlling intersections on the bike route. In January 2014, after two months of providing free security and safe passage through heavy intersections, the Houston Police Department began considering options to charge the group for providing security for the event, citing similarities to providing security for funeral processions through the
city A city is a human settlement of a substantial size. The term "city" has different meanings around the world and in some places the settlement can be very small. Even where the term is limited to larger settlements, there is no universally agree ...
limits. Some Critical Mass riders have spoken out in protest of paying a fee to utilize extra security and escorting through busy intersections, while many others support paying fees for extra security to keep the ride safe, which has led to increased discussions between the
city A city is a human settlement of a substantial size. The term "city" has different meanings around the world and in some places the settlement can be very small. Even where the term is limited to larger settlements, there is no universally agree ...
and group for additional alternatives to the building conflicts.


London, United Kingdom

In
London London is the Capital city, capital and List of urban areas in the United Kingdom, largest city of both England and the United Kingdom, with a population of in . London metropolitan area, Its wider metropolitan area is the largest in Wester ...
in September 2005, a few weeks after the 7 July 2005 bombings, Metropolitan Police required the organisers to provide a route six days before the event and placed strict restrictions on riders, under threat of arrest. The threat was retracted when politicians and cyclist groups objected. In October 2005, the ride had close to 1,200 participants, significantly more than usual. A long stop in
Parliament Square Parliament Square is a square at the northwest end of the Palace of Westminster in the City of Westminster in central London, England. Laid out in the 19th century, it features a large open green area in the centre with trees to its west, and ...
, part of the government's exclusion area in the
Serious Organised Crime and Police Act 2005 The Serious Organised Crime and Police Act 2005 (c. 15) (often abbreviated to SOCPA or SOCAP) is an Act of Parliament, Act of the Parliament of the United Kingdom aimed primarily at creating the Serious Organised Crime Agency. It also significan ...
, led to a slow and cumbersome ride. One participant sought a declaration from the
High Court of England and Wales The High Court of Justice in London, known properly as His Majesty's High Court of Justice in England, together with the Court of Appeal and the Crown Court, are the Senior Courts of England and Wales. Its name is abbreviated as EWHC (England ...
that police need not be notified about the rides, in a "friendly action" in which neither side sought
damages At common law, damages are a remedy in the form of a monetary award to be paid to a claimant as compensation for loss or injury. To warrant the award, the claimant must show that a breach of duty has caused foreseeable loss. To be recognized at ...
. The High Court agreed, exempting Critical Mass from notification under Section 11 of the
Public Order Act 1986 The Public Order Act 1986 (c. 64) is an Act of the Parliament of the United Kingdom that creates a number of public order offences. They replace similar common law offences and parts of the Public Order Act 1936. It implements recommendations
. The ruling was reversed on appeal. In 2008,
Friends of the Earth Friends of the Earth International (FoEI) is an international network of grassroots environmental organizations in 73 countries. About half of the member groups call themselves "Friends of the Earth" in their own languages; the others use other ...
, who supported the legal action, said the case would be appealed to England's highest legal authority, the
House of Lords The House of Lords is the upper house of the Parliament of the United Kingdom. Like the lower house, the House of Commons of the United Kingdom, House of Commons, it meets in the Palace of Westminster in London, England. One of the oldest ext ...
, on the grounds that, after 11 years, Critical Mass is "commonly or customarily held." In October 2008, the House of Lords ruled in favour of the Critical Mass participant. During the
2012 Summer Olympics The 2012 Summer Olympics, officially the Games of the XXX Olympiad and also known as London 2012, were an international multi-sport event held from 27 July to 12 August 2012 in London, England, United Kingdom. The first event, the ...
, cyclists were arrested on opening day after police claim they ignored regulations in place during the Olympics. Jenny Jones of the
Green Party A green party is a formally organized political party based on the principles of green politics, such as environmentalism and social justice. Green party platforms typically embrace Social democracy, social democratic economic policies and fo ...
and the Greater London Assembly has questioned the police actions, calling them "out of all proportion to common sense" and "tragically unnecessary." A Critical Mass website asked riders to be "peacefully assertive" during the monthly ride, while police claim they asked riders to keep to the south of the
River Thames The River Thames ( ), known alternatively in parts as the The Isis, River Isis, is a river that flows through southern England including London. At , it is the longest river entirely in England and the Longest rivers of the United Kingdom, s ...
. When the riders got close to the
Olympic Park An Olympic Park is a sports campus for hosting the Olympic Games. Typically it contains the Olympic Stadium and the International Broadcast Centre. It may also contain the Olympic Village or some of the other sports venues, such as the aquatics ...
, police began to cordon off the area and arrest riders. In total, 182 people were arrested, of whom 4 were charged, and 178 were
bail Bail is a set of pre-trial restrictions that are imposed on a suspect to ensure that they will not hamper the judicial process. Court bail may be offered to secure the conditional release of a defendant with the promise to appear in court when ...
ed pending further inquiries. The action led to 5 of the 182 people arrested being convicted in court.


Minneapolis, Minnesota, US

On the August 31, 2007, ride in
Minneapolis, Minnesota Minneapolis is a city in Hennepin County, Minnesota, United States, and its county seat. With a population of 429,954 as of the 2020 United States census, 2020 census, it is the state's List of cities in Minnesota, most populous city. Locat ...
, a confrontation occurred between cyclists and the police. The police presence included
undercover A cover in foreign, military or police human intelligence or counterintelligence is the ostensible identity and role or position in an infiltrated organization assumed by a covert agent during a covert operation. Official cover In espionage, a ...
officers, three marked squad cars, a state
patrol A patrol is commonly a group of personnel, such as law enforcement officers, military personnel, or security personnel, that are assigned to monitor or secure a specific geographic area. Etymology The word "patrol" is derived from the Frenc ...
helicopter, and unmarked vehicles. The ride had been linked with weekend protests of the following year's
Republican National Convention The Republican National Convention (RNC) is a series of presidential nominating conventions held every four years since 1856 by the Republican Party in the United States. They are administered by the Republican National Committee. The goal o ...
. After the arrest of a cyclist for "riding in a snake-like manner," cyclists began chanting "Let him go!" and "What's the charge?" The police called for backup, and dozens of police officers responded, using mace and
taser Taser (stylized in all caps) is a line of handheld conducted energy devices (CED) sold by Axon Enterprise (formerly Taser International). The device fires two small barbed darts intended to puncture the skin and remain attached to the targe ...
s. Minneapolis police arrested 19 participants, including three minors. The adults were arrested on suspicion of rioting, a
gross misdemeanor In United States law, a gross misdemeanor is a crime which is more serious than a regular misdemeanor, but is still classified as a minor crime, as opposed to serious crimes. Such crimes may include petty theft, simple assault or driving under t ...
.


Minsk, Belarus

On May 27, 2011, in
Minsk Minsk (, ; , ) is the capital and largest city of Belarus, located on the Svislach (Berezina), Svislach and the now subterranean Nyamiha, Niamiha rivers. As the capital, Minsk has a special administrative status in Belarus and is the administra ...
, Belarus, police forces aided by special units transported 13 cyclists to the police station for violation of traffic rules and for not following orders to disband. Detained participants were
fingerprint A fingerprint is an impression left by the friction ridges of a human finger. The recovery of partial fingerprints from a crime scene is an important method of forensic science. Moisture and grease on a finger result in fingerprints on surfa ...
ed and fined, then released. On April 30, 2016, two cyclists were arrested during a Critical Mass action. As of September 2016, one was released and the other is facing trial.


New York City, New York, US

Police in
New York City New York, often called New York City (NYC), is the most populous city in the United States, located at the southern tip of New York State on one of the world's largest natural harbors. The city comprises five boroughs, each coextensive w ...
have claimed that Critical Mass bicyclists blocking intersections to allow bikes to pass may delay emergency vehicles in the
gridlock Gridlock is a form of traffic congestion where continuous queues of vehicles block an entire network of intersecting streets, bringing traffic in all directions to a complete standstill. The term originates from a situation possible in a grid ...
.


2004 Republican National Convention

During the US
2004 Republican National Convention The 2004 Republican National Convention took place from August 30 to September 2, 2004, at Madison Square Garden in New York City, New York. The convention is one of a series of Republican National Convention, historic quadrennial meetings at w ...
, police arrested 250 riders after the ride caused "massive disruptions" in the city. Many court cases resulted regarding the legality of the ride, whether police have the right to arrest cyclists and seize bicycles, and whether the event needs a permit. In December 2004, a federal judge dismissed New York City's
injunction An injunction is an equitable remedy in the form of a special court order compelling a party to do or refrain from doing certain acts. It was developed by the English courts of equity but its origins go back to Roman law and the equitable rem ...
against Critical Mass as a "political event." On March 23, 2005, the city filed a lawsuit seeking to prevent
Time's Up! Time's Up! Environmental Organization was founded in 1987 to help educate New Yorkers about environmental awareness. One of its main focuses is to promote non-polluting transportation by advocating for bicycling. Time's Up! helped found New ...
, a
direct action Direct action is a term for economic and political behavior in which participants use agency—for example economic or physical power—to achieve their goals. The aim of direct action is to either obstruct a certain practice (such as a governm ...
environmental group The environmental movement (sometimes referred to as the ecology movement) is a social movement that aims to protect the natural world from harmful environmental practices in order to create sustainable living. In its recognition of humanity a ...
, from promoting or advertising Critical Mass rides. The lawsuit also stated that Time's Up! and the public could not ride or gather at a Critical Mass bike ride, claiming a permit was required.


2008 bicycle rally

During a bicycle rally on July 25, 2008,
NYPD The City of New York Police Department, also referred to as New York City Police Department (NYPD), is the primary law enforcement agency within New York City. Established on May 23, 1845, the NYPD is the largest, and one of the oldest, munic ...
patrolman Patrick Pogan pushed rider Christopher Long off his bicycle. In a criminal complaint, Pogan wrote that he had ordered Long to stop because he was weaving in and out of traffic, forcing vehicles to swerve or stop, and generally disrupting the normal flow of traffic. In addition, Pogan wrote that he suffered
lacerations A wound is any disruption of or damage to living tissue, such as skin, mucous membranes, or organs. Wounds can either be the sudden result of direct trauma (mechanical, thermal, chemical), or can develop slowly over time due to underlying diseas ...
on his arms because Long steered his bike into him and knocked him down, and when he tried to place Long under arrest, Long began flailing, kicking and screaming, "You are pawns in the game!" Long spent the next day in
police custody Police custody may refer to: * Arrest An arrest is the act of apprehending and taking a person into custody (legal protection or control), usually because the person has been suspected of or observed committing a crime. After being taken in ...
on charges of attempted assault, resisting arrest and
disorderly conduct Disorderly conduct is a crime in most jurisdictions, such as the United States and China. Typically, "disorderly conduct" is a term used to refer to any behavior that is considered unacceptable in a formal, civilized or controlled environment. ...
. Within days, members of the rally's sponsoring organization
Time's Up! Time's Up! Environmental Organization was founded in 1987 to help educate New Yorkers about environmental awareness. One of its main focuses is to promote non-polluting transportation by advocating for bicycling. Time's Up! helped found New ...
posted a video of the incident on
YouTube YouTube is an American social media and online video sharing platform owned by Google. YouTube was founded on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim who were three former employees of PayPal. Headquartered in ...
. The video went
viral The word ''Viral'' means "relating to viruses" (small infectious agents). It may also refer to: Viral behavior, or virality Memetic behavior likened that of a virus, for example: * Viral marketing, the use of existing social networks to spre ...
and received over 400,000
hits Hits or H.I.T.S. may refer to: Arts, entertainment, and media Music * '' H.I.T.S.'', 1991 album by New Kids on the Block * ''...Hits'' (Phil Collins album), 1998 * ''Hits'' (compilation series), 1984–2006; 2014, a British compilation album s ...
within five days. Critical Mass activists claimed it supported their claims that the police department has demonstrated a pattern of arresting participants in the rally on false charges. Witnesses also disputed Pogan's account, saying that Long was the one to receive injuries, traffic was stopped for the rally, and that Pogan had simply scanned the group of cyclists to find one he could take down. The union that represents NYPD officers said Pogan was just doing his job to protect the public from a reckless bike rider, and Pogan's father — himself a retired NYPD
detective A detective is an investigator, usually a member of a law enforcement agency. They often collect information to solve crimes by talking to witnesses and informants, collecting physical evidence, or searching records in databases. This leads the ...
— defended him, saying "You gotta do what you gotta do to make an arrest." The
prosecutor A prosecutor is a legal representative of the prosecution in states with either the adversarial system, which is adopted in common law, or inquisitorial system, which is adopted in Civil law (legal system), civil law. The prosecution is the ...
's office dismissed the charges against Long. NYPD placed Pogan, who had spent only three weeks as a police officer, on a desk assignment while the city investigated the incident. On December 16, 2008, Pogan appeared in court and pleaded not guilty to
felony A felony is traditionally considered a crime of high seriousness, whereas a misdemeanor is regarded as less serious. The term "felony" originated from English common law (from the French medieval word "''félonie''") to describe an offense that r ...
charges of falsifying business records and filing a false instrument, and
misdemeanor A misdemeanor (American English, spelled misdemeanour elsewhere) is any "lesser" criminal act in some common law legal systems. Misdemeanors are generally punished less severely than more serious felonies, but theoretically more so than admi ...
charges of third-degree
assault In the terminology of law, an assault is the act of causing physical harm or consent, unwanted physical contact to another person, or, in some legal definitions, the threat or attempt to do so. It is both a crime and a tort and, therefore, may ...
, second-degree
harassment Harassment covers a wide range of behaviors of an offensive nature. It is commonly understood as behavior that demeans, humiliates, and intimidates a person, and it is characteristically identified by its unlikelihood in terms of social and ...
and making a punishable false written statement. After the
indictment An indictment ( ) is a formal accusation that a person has committed a crime. In jurisdictions that use the concept of felonies, the most serious criminal offense is a felony; jurisdictions that do not use that concept often use that of an ind ...
, the police department suspended Pogan and, two months later, Pogan resigned as the department prepared to fire him. His attorney said that his defense would center on the department's training procedures and claims that events occurring off-camera needed to be taken into account. On July 8, 2009, it was reported that Long, then a
Hoboken, NJ Hoboken ( ; ) is a city in Hudson County in the U.S. state of New Jersey. Hoboken is part of the New York metropolitan area and is the site of Hoboken Terminal, a major transportation hub. As of the 2020 United States census, the city's popula ...
, resident, was suing the New York Police Department for $1.5 million, alleging that Pogan falsified his arrest report in order to legitimize his assault on Long. During his trial in April 2010, Pogan acknowledged that the video looked "very extreme." He testified that he had anticipated a collision with Long, since the rider lowered his right shoulder as the officer approached. Jurors found Pogan not guilty of harassment and assault and acquitted him of four of the seven counts of which he had been charged. He was found guilty of filing a criminal complaint that contained false statements concerning the cyclist. Pogan received no jail time but, because he is a convicted
felon A felony is traditionally considered a crime of high seriousness, whereas a misdemeanor is regarded as less serious. The term "felony" originated from English common law (from the French medieval word "''félonie''") to describe an offense that ...
, he is not eligible to become a New York City police officer in the future. Long said in an interview that he was pleased with the verdict, in part because it would prevent Pogan from becoming a New York City police officer again.


Oakland, California, US

On September 9, 2022, in
Oakland, California Oakland is a city in the East Bay region of the San Francisco Bay Area in the U.S. state of California. It is the county seat and most populous city in Alameda County, California, Alameda County, with a population of 440,646 in 2020. A major We ...
, during the monthly East Bay Bike Party two cyclists were struck by a west-bound gray sedan as they were traveling east on Alcatraz Avenue. According to witnesses, a few minutes prior to the collisions, a different car had driven in the opposite lane to bypass slow-moving cars and bicyclists. This move forced vehicle traffic to have to slow down even further, causing drivers to become even more impatient. The group of cyclists was expanding into the westbound lane when the gray sedan approached. Witnesses report that the car had its window down, and many participants were yelling at the driver to slow down or stop. Instead, the driver sped up, accelerating directly into the two cyclists and narrowly missing a dozen other cyclists, including children. One witness stated "There was no doubt in my mind he just did it on purpose. He looked mad and was using his car as a weapon." The Oakland Police Department has not apprehended anyone, even after being provided video, eyewitness accounts, and a license plate number. An OPD officer appeared to blame the riders, saying the department received multiple calls from citizens that bicyclists in the area near Alcatraz were creating a hazard causing vehicular traffic.


Porto Alegre, Brazil

On February 25, 2011, an automobile driver deliberately collided with around 20 cyclists that were participating in a Critical Mass event in Rua José do Patrocinio in
Porto Alegre Porto Alegre (, ; , ; ) is the capital and largest city of the Brazilian Federative units of Brazil, state of Rio Grande do Sul. Its population of roughly 1.4 million inhabitants (2022) makes it the List of largest cities in Brazil, 11th-most p ...
, southern
Brazil Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population ...
. Out of approximately 150 people that were taking part in the event, dozens of bicycles were damaged, 15 people were injured and eight were transported to the
emergency room An emergency department (ED), also known as an accident and emergency department (A&E), emergency room (ER), emergency ward (EW) or casualty department, is a medical treatment facility specializing in emergency medicine, the acute care of pat ...
. While the driver left the scene of the incident, demonstrators remained on the street, demanding that the driver be found and arrested. The driver was later identified as 47-year-old Ricardo José Neis. After Neis gave his statement to the police, his attorney, Luis Fernando Coimbra Albino, stated that the Neis was acting in self-defense after several cyclists threatened him and his son and assaulted his car. According to witnesses present at the event, Neis was acting violently behind the bicycles and hit the rear wheels of two different cyclists, and any contact from the cyclists on his car was meant as a sign asking him to slow the vehicle down. Witnesses also reported that Neis had two different transversal roads he could have taken to avoid waiting for the cyclists to proceed. On March 1, 2011, Neis attempted to transfer from a hospital to a
psychiatric clinic A psychiatric hospital, also known as a mental health hospital, a behavioral health hospital, or an asylum is a specialized medical facility that focuses on the treatment of severe mental disorders. These institutions cater to patients with ...
, but this request was rejected by court officials. He was held in the hospital under police custody, but was later released and
indicted An indictment ( ) is a formal accusation that a person has committed a crime. In jurisdictions that use the concept of felonies, the most serious criminal offense is a felony; jurisdictions that do not use that concept often use that of an indi ...
under 17 counts of attempted murder. One of the most severely injured cyclists, 23-year-old Ricardo Mattes Ambus, was readmitted to the hospital on March 3, 2011, due to an intracranial haematoma. During the following week, between February 28 and March 6, 2011, many protests in support of Critical Mass Porto Alegre were organized in several major cities in
South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a considerably smaller portion in the Northern Hemisphere. It can also be described as the southern Subregion#Americas, subregion o ...
and around the world. In response, local cyclists organized the World Bike Forum in
Porto Alegre Porto Alegre (, ; , ; ) is the capital and largest city of the Brazilian Federative units of Brazil, state of Rio Grande do Sul. Its population of roughly 1.4 million inhabitants (2022) makes it the List of largest cities in Brazil, 11th-most p ...
to raise awareness of violence in traffic against cyclists. The first Forum took place during the anniversary of the incident. On November 24, 2016, Ricardo Neis was sentenced to 12 years and 9 months in jail for attempted murder and aggravated assault.


San Francisco, California, US


July 1997

On the night of July 25, 1997, in
San Francisco San Francisco, officially the City and County of San Francisco, is a commercial, Financial District, San Francisco, financial, and Culture of San Francisco, cultural center of Northern California. With a population of 827,526 residents as of ...
, the ride attracted 5,000 participants, which resulted in congested traffic, confrontations with motorists, and arrests. Interest and tension had been growing for several weeks due to increased
rhetoric Rhetoric is the art of persuasion. It is one of the three ancient arts of discourse ( trivium) along with grammar and logic/ dialectic. As an academic discipline within the humanities, rhetoric aims to study the techniques that speakers or w ...
from then-Mayor Willie Brown regarding cracking down on the event. The local newspapers published a city-approved route after the mayor withdrew his threat to have bicyclists arrested for not obtaining a
parade A parade is a procession of people, usually organized along a street, often in costume, and often accompanied by marching bands, floats, or sometimes large balloons. Parades are held for a wide range of reasons, but are usually some variety ...
permit. Because of the large turnout, it was difficult if not impossible for cyclists to follow the sanctioned route. Riders instead found themselves engaged in verbal and physical altercations with motorists and police, as well as among themselves. Two officers reported injuries in confrontations with bike riders. Local media reported that "about 250" bicyclists were arrested, most for disrupting traffic, and a few for being drunk in public,
battery Battery or batterie most often refers to: * Electric battery, a device that provides electrical power * Battery (crime), a crime involving unlawful physical contact Battery may also refer to: Energy source * Battery indicator, a device whic ...
, and outstanding
warrants Warrant may refer to: * Warrant (law), a form of specific authorization ** Arrest warrant, authorizing the arrest and detention of an individual ** Search warrant, a court order issued that authorizes law enforcement to conduct a search for eviden ...
.


March 2007

On the March 2007 ride in San Francisco, a rider was arrested on felony (later reduced to misdemeanor) charges in San Francisco's Tenderloin neighborhood for denting a
limousine A limousine ( or ), or limo () for short, is a large, chauffeur-driven luxury vehicle with a partition between the driver compartment and the passenger compartment which can be operated mechanically by hand or by a button electronically. A luxu ...
using a
bicycle lock A bicycle lock is a security device used to deter bicycle theft, either by simply locking one of the wheels or by fastening the bicycle to a fixed object, e.g., a bike rack. Locking devices vary in size and security, the most secure tending to ...
. The driver told police he got out of his car to talk to two cyclists who allegedly blocked his path. After exchanging words with one of the cyclists, the driver said he grabbed one of the bicycles and tried to pull it out of the way. He then got back into his limo to go around the riders, but before he could move, he said, another cyclist ran into the side of his car, then punched the hood with a U-shaped lock. The cyclist told police he only hit the limousine after the driver gunned his engine. During the incident, one of the limousine's tires was slashed and the driver's keys were stolen. Towards the end of the ride, near the Japan Center and
Western Addition The Western Addition is a district in San Francisco, California, United States. Location The Western Addition is located between Van Ness Avenue, the Richmond District, the Haight-Ashbury and Lower Haight neighborhoods, and Pacific Heights. ...
neighborhoods, a mother from
Redwood City, California Redwood City is a city on the San Francisco Peninsula in the San Francisco Bay Area, Bay Area of Northern California, approximately south of San Francisco and northwest of San Jose, California, San Jose. The city's population was 84,292 accor ...
, traveling with her two young daughters in the vehicle, tried to drive through the mass of riders. A witness claimed to have observed the driver strike a cyclist and flee before cyclists chased and surrounded her vehicle. The driver denied striking a cyclist and alleged that hundreds of cyclists surrounded her minivan while she and her 11- and 13-year-old daughters were inside, banged on her car, scratched the paint, and threw a bicycle through the rear window of the vehicle, causing $5,300 in damages. In April 2007, San Francisco Mayor
Gavin Newsom Gavin Christopher Newsom ( ; born October 10, 1967) is an American politician and businessman serving since 2019 as the 40th governor of California. A member of the Democratic Party (United States), Democratic Party, he served from 2011 to 201 ...
requested that Critical Mass riders police themselves. "It does the bicycle-advocacy community no good to have people that are aggressive and dispirit the entire movement," Newsom said. "I would encourage the bicycle
coalition A coalition is formed when two or more people or groups temporarily work together to achieve a common goal. The term is most frequently used to denote a formation of power in political, military, or economic spaces. Formation According to ''A G ...
to say, 'Look, we don't put up with this, enough is enough.' "


November 2009

In November 2009, Stanley Roberts of
KRON KRON-TV (channel 4) is a television station licensed to San Francisco, California, United States, serving as the San Francisco Bay Area's outlet for The CW. Owned and operated by The CW's majority owner, Nexstar Media Group, KRON-TV has studios ...
4 News recorded several Critical Mass confrontations between bicyclists and vehicles at Van Ness and O'Farrell Streets. An old Critical Mass website advised riders not to be confrontational and block traffic, but in footage filmed by Roberts, bicyclists engaged in confrontational arguments with motorists and blocked roads to vehicular traffic.


August 2015

In August 2015, KQED posted an article on a Critical Mass confrontation between a bicyclist and a female
Zipcar Zipcar is an American car sharing, car-sharing company and a subsidiary of Avis Budget Group. Zipcar provides vehicle reservations to its members, billable by the minute, hour or day; members may have to pay a monthly or annual membership fee i ...
driver in the San Francisco Marina District. 39 year old Ian Hespelt was arrested a few days later by the San Francisco Police Department's bicycle patrol at
AT&T Park Oracle Park is a ballpark in the South of Market, San Francisco, SoMa district of San Francisco, California. Since 2000, it has been the home of the San Francisco Giants of Major League Baseball (MLB). The stadium stands along San Francisco Bay ...
during the
Billy Joel William Martin Joel (born May 9, 1949) is an American singer, songwriter, and pianist. Nicknamed the "Honorific nicknames in popular music, Piano Man" after his Signature song, signature 1973 song Piano Man (song), of the same name, Joel has ha ...
concert. Hespelt was charged with four felonies including assault, vandalism, maliciously throwing a substance at a vehicle and false imprisonment. Hespelt was also wanted in Washington state on a felony drug charge warrant.


Seattle, Washington, US


June 2006

Two riders were arrested during the June 2006 ride in
Seattle, Washington Seattle ( ) is the List of municipalities in Washington, most populous city in the U.S. state of Washington (state), Washington and in the Pacific Northwest region of North America. With a population of 780,995 in 2024, it is the List of Unit ...
, after a fight with two undercover detectives whom the cyclists confused for
gang A gang is a social group, group or secret society, society of associates, friends, or members of a family with a defined leadership and internal organization that identifies with or claims control over Wiktionary:territory#Noun, territory in a ...
members. Witnesses disputed the claim made by the sheriff's office that the detectives identified themselves. The
King County Sheriff's Office The King County Sheriff's Office (KCSO) is a local law enforcement agency in King County, Washington, United States. It is the primary law enforcement agency for all unincorporated areas of King County, as well as 13 cities and two transit agenci ...
decided not to press felony charges in the case, saying there were too many issues over the circumstances surrounding the
allegation In law, an allegation is a claim of an unproven fact by a party in a pleading, charge, or defense. Until they can be proved, allegations remain merely assertions. Types of allegations Marital allegations There are also marital allegations: m ...
s.


July 2008

On July 25, 2008, Critical Mass prevented a motorist from driving from a curbside
parking space A parking space, parking place or parking spot is a location that is designated for parking, either paved or unpaved. It can be in a parking garage, in a parking lot or on a city street. The space may be delineated by road surface markings. The ...
into cyclists in
Seattle Seattle ( ) is the most populous city in the U.S. state of Washington and in the Pacific Northwest region of North America. With a population of 780,995 in 2024, it is the 18th-most populous city in the United States. The city is the cou ...
's Critical Mass on East Aloha. The motorist made statements to Seattle police that he drove away, hitting bicycles and riders (one of them an attorney), and told the press that he "freaked out and overreacted" when bicyclists threatened to tip his vehicle. According to some witnesses, the motorist drove into at least two cyclists and tried to flee. A group of riders caught the vehicle, broke its rear windshield, slashed the tires, and assaulted the motorist when he got out. Damage to the car was estimated at $1,500. The motorist was struck in the back of his head by a bike lock and later hospitalized. Two cyclists were arrested for
vandalism Vandalism is the action involving deliberate destruction of or damage to public or private property. The term includes property damage, such as graffiti and defacement directed towards any property without permission of the owner. The t ...
to the car. Seattle police did not charge the motorist.


Vilnius, Lithuania

On July 27, 2007, in
Vilnius, Lithuania Vilnius ( , ) is the capital of and List of cities in Lithuania#Cities, largest city in Lithuania and the List of cities in the Baltic states by population, most-populous city in the Baltic states. The city's estimated January 2025 population w ...
, police took five participants into custody, including two minors, for not following orders to disband.


Walnut Creek, California, US

In
Walnut Creek, California Walnut Creek is a city in Contra Costa County, California, United States, located in the East Bay region of the San Francisco Bay Area, about east of the city of Oakland, California, Oakland. Walnut Creek has a total population of 70,127 per t ...
, on June 20, 2008, a car bumped into the rear wheel of a Critical Mass rider. An argument ensued among the driver and passenger of the car and the cyclist involved, after which the passenger and driver of the car assaulted the cyclist. The police arrived and arrested the passenger and driver of the automobile involved in the assault.


Warsaw, Poland

On June 21, 2002, in
Warsaw, Poland Warsaw, officially the Capital City of Warsaw, is the capital and largest city of Poland. The metropolis stands on the River Vistula in east-central Poland. Its population is officially estimated at 1.86 million residents within a grea ...
, the Critical Mass event was stopped by a cordon of fully armed
riot police Riot police are police who are organized, deployed, trained or equipped to confront crowds, protests or riots. Riot police may be regular police officers who act in the role of riot police in particular situations, or they may be separate unit ...
on Plac Konstytucji (Constitution Square), who demanded their dispersal and detained some of the participants. Other Critical Mass participants responded with a
sit-in protest A sit-in or sit-down is a form of direct action that involves one or more people occupying an area for a protest, often to promote political, social, or economic change. The protestors gather conspicuously in a space or building, refusing to mo ...
, blocking an important traffic
junction Junction may refer to: Arts and entertainment * ''Junction'' (2012 film), an American film * ''Junction'' (2024 film), an American film * ''Jjunction'', a 2002 Indian film * ''Junction'' (album), a 1976 album by Andrew Cyrille * Junction (E ...
, and then tried to evade the
blockade A blockade is the act of actively preventing a country or region from receiving or sending out food, supplies, weapons, or communications, and sometimes people, by military force. A blockade differs from an embargo or sanction, which are ...
by taking different routes to Plac Zamkowy (Castle Square), the Critical Mass rally point. This event was widely reported by the media and, as a result, the Warsaw
municipality A municipality is usually a single administrative division having municipal corporation, corporate status and powers of self-government or jurisdiction as granted by national and regional laws to which it is subordinate. The term ''municipality' ...
decided to legalize future events, rather than escalate the conflict. Beginning in September 2002, Critical Mass events in Warsaw are organized in full cooperation with the police force. Once a year in August, beginning in 2007, a special Critical Mass is organized in cooperation with the city officials to commemorate the
Warsaw Uprising The Warsaw Uprising (; ), sometimes referred to as the August Uprising (), or the Battle of Warsaw, was a major World War II operation by the Polish resistance movement in World War II, Polish underground resistance to liberate Warsaw from ...
.


Buenos Aires, Argentina

On March 28, 2013, in
Buenos Aires, Argentina Buenos Aires, controlled by the government of the Autonomous City of Buenos Aires, is the Capital city, capital and largest city of Argentina. It is located on the southwest of the Río de la Plata. Buenos Aires is classified as an Alpha− glob ...
, a taxi driver ran over a group of Critical Mass riders, injuring 2 cyclists, before fleeing from the scene.


References

{{Reflist, 30em DIY culture Environmentalism History of cycling Protests Cycling events Crimes