From
Greatest Films: a broad form of comedy in which the humor comes from physical acts or pantomime, frequently harmless violence and pratfalls intended to produce laughter. The name was derived from a device called a slapstick, two boards that slapped together with a loud crack when used to strike something or someone; prevalent during the silent era and in early talkies, with its primary motif being pie-throwing.
Examples: Keystone Kops, Charlie Chaplin, Laurel and Hardy, Buster Keaton, the Three Stooges, and more recently, Jerry Lewis and Jim Carrey.
Tim, you may remember this word

"Always do right. This will gratify some people and astonish the rest." -- Mark Twain