Frederick John Westcott, best known by his stage name Fred Karno, was an English theatre impresario of the British music hall. As a comedian of slapstick he is credited with popularising the custard-pie-in-the-face gag. During the 1890s, in order to circumvent stage censorship, Karno developed a form of sketch comedy without dialogue.

Slapstick is a style of humor involving exaggerated physical activity that exceeds the boundaries of normal physical comedy. Slapstick may involve both intentional violence and violence by mishap, often resulting from inept use of props such as saws and ladders.