What's better than a hilarious prank video? How about watching the victim get super mad! I found this on a horror website, but these videos are funny, as is the article itself.
http://fullmoonhorror.com/2011/11/25...backfire-pt-2/
(here's part one of the article - they broke it up into two sections):
http://fullmoonhorror.com/2011/11/22...scares-go-bad/