Professional wrestling is a form of performance art where the participants engage in simulated sporting matches. Originating in the days of traveling carnival shows, professional wrestling's humbler beginnings include strongman feats, hook wrestling, and other acrobatic performances.
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The outcome of matches are usually decided well before the performance is acted out. Sometimes they are entirely scripted. Occasionally the outcome depends on how the audience reacts to the ongoing performance. Audience reaction is a factor in unscripted performances. A select few matches, usually in small venues, are left to the performers to decide if they wish to decide the outcome by actually wrestling. However, they are still expected to put on a good show, which involves moves and styles that look good even if they are not the most efficient for wrestling.

Pro-wrestling organizations:
* World Wrestling Entertainment (WWE)
* World Championship Wrestling (WCW)
* Extreme Championship Wrestling (ECW)
* Consejo Mundial de Lucha Libre (CMLL)
* Empresa Mexicana de la Lucha Libre (EMLL)
* New Japan Pro Wrestling (新日本プロレス; Shin Nihon Puroresu)

Although this is a performance art, the punches, kicks and such are quite real even if not meant to be truly injuring. Usually the wrestlers have skill in (they're taught to) hitting places or in ways that produce the most bleeding, such as splitting the opponents brow. Blading is the most common type of permanent injury pro wrestlers get.