The term IT OFTEN INVOLVES PIE THROWING is referring to the comedic style of SLAPSTICK, which is a type of physical comedy that often involves exaggerated violence and humorous stunts. SLAPSTICK is characterized by its use of exaggerated sound effects, physical stunts, and props such as pies, buckets of water, and other objects. It is often used in films, television shows, and plays to create a humorous effect.