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A bed of nails is an
Less traditional settings, such as science centers, may use an electronic retractable bed of nails, where the user lies on a flat plastic bed with holes in it, and can then activate the machine to have nails rise up all at once. The nails should retract before getting off the bed. This retraction eliminates the most dangerous part of a traditional bed of nails, getting on and off the bed.
A bed of nails is an oblong
An oblong is an object longer than it is wide, especially a non-square rectangle.
Oblong may also refer to:
Places
* Oblong, Illinois, a village in the United States
* Oblong Township, Crawford County, Illinois, United States
* A strip of land ...
piece of wood, the size of a bed, with nails pointing upwards out of it. While it appears at first glance that anyone lying on such a "bed" would be injured by the nails, if the nails are numerous enough, the weight is distributed among them so that the pressure exerted by each nail is not enough to puncture the person's skin
Skin is the layer of usually soft, flexible outer tissue covering the body of a vertebrate animal, with three main functions: protection, regulation, and sensation.
Other animal coverings, such as the arthropod exoskeleton, have different ...
.
Uses
One use of such a device is formagic tricks
Magic, which encompasses the subgenres of close-up magic, parlor magic, and stage magic, among others, is a performing art in which audiences are entertained by tricks, effects, or illusions of seemingly impossible feats, using natural mea ...
or physics demonstrations. For example, the bed of nails was used in vaudeville
Vaudeville (; ) is a theatrical genre of variety entertainment which began in France in the middle of the 19th century. A ''vaudeville'' was originally a comedy without psychological or moral intentions, based on a comical situation: a drama ...
in the United States, as well as in sideshow
In North America, a sideshow is an extra, secondary production associated with a circus, traveling carnival, carnival, fair, or other such attraction. They historically featured human oddity exhibits (so-called “Freak show, freak shows”), pr ...
s of circuses and carnivals. A famous example requires a volunteer to lie on a bed of several thousand nails, with a board on top of him. Cinder block
A concrete block, also known as a cinder block in North American English, breeze block in British English, or concrete masonry unit (CMU), or by #Naming, various other terms, is a standard-size rectangular block used in building constructio ...
s are placed on the board and then smashed with a sledgehammer
A sledgehammer is a tool with a large, flat, massive, often metal head, attached to a long wooden or solid handle. The long handle is combined with a heavy head which allows the sledgehammer to pick up momentum during a swing and applying a large ...
. Despite the seemingly unavoidable force, the volunteer is not harmed: the force from the blow is spread among the thousands of nails, resulting in reduced pressure; the breaking of the blocks also dissipates much of the energy from the hammer. This demonstration of the principles of weight distribution requires that the weight of the volunteer be spread over as many nails as possible. The most dangerous part is the moment of lying down or getting up, when one's weight may briefly be supported on only a few nails. Some "beds" have rails mounted at the sides to help users lie down and get up safely.
Less traditional settings, such as science centers, may use an electronic retractable bed of nails, where the user lies on a flat plastic bed with holes in it, and can then activate the machine to have nails rise up all at once. The nails should retract before getting off the bed. This retraction eliminates the most dangerous part of a traditional bed of nails, getting on and off the bed.
See also
*Firewalking
Firewalking is the act of walking barefoot over a bed of hot embers or stones. It has been practiced by many people and cultures in many parts of the world, with the earliest known reference dating from Iron Age India . It is often used as a rite ...
References
External links
* . Darylscience.com {{DEFAULTSORT:Bed Of Nails Sideshow attractions Asceticism Nail (fastener)