What are the Funniest Pranks to Pull on Trick-or-Treaters?

The Scare From Behind 1 of 16

It's a classic, but works every time. The scare from behind requires two people. The first person hands out candy to the unsuspecting children while the other hides on the side of the home in a scary costume. At just the right moment -- BOOM -- they pop out and scare the trick-or-treaters.