I was interested to hear the actress Keira Knightley interviewed. She said that film sets are full of people playing practical jokes on each other. So this had me thinking.. would I be good enough at them to be considered a "black belt master of practical jokes"? What sort of practical jokes have you commited? What sort of jokes have you been the "victim" of? Have you ever regretted one? I'd be interested to hear. Later in the thread, I'll post some of the most immature ones I've ever done.