I used to be a bit of a trouble maker in elementary/middle school. Thankfully, I'd kiss ass with the Administrators and never get in serious trouble.
But gosh -- I used to own one of these things:
www.tvbgone.com/cfe_tvbg_main.php
Freakin' hilarious. I'd constantly mess with teachers during movies, presentations, etc. I'd also bring some of this stuff:
www.liquidass.com/
The smell literally wouldn't leave the area you sprayed it for a good week. I had a friend run up and spray it on 2-3 people's bums. Needless to say -- it followed 'em everywhere.
Fun times. I guess you could say I was a bit of a Bart Simpson.