It can include slapstick, clowning, mime, physical stunts, or making funny faces.
[1] Physical comedy originated as part of the Commedia dell'arte.
[2] It is now sometimes incorporated into sitcoms; for example, in the sitcom Three's Company, actor John Ritter frequently performed pratfalls.
Cartoons, particularly film shorts, also commonly depict an exaggerated form of physical comedy (incorporating cartoon physics), such as in Tom and Jerry and Wile E. Coyote and the Road Runner.
[3] Charlie Chaplin started his film career as a physical comedian; although he developed additional means of comic expression, Chaplin's mature works continued to contain elements of slapstick.