High school was a magical time for me. Not just because I was experiencing the wonderment of puberty first-hand and trying to figure out just who the hell I am (spoiler alert: I still have no friggin' clue).
It was magical for me because it seemed like there was no greater calling in life than planning and executing a perfect practical joke. And the best practical jokes were the ones that not only trolled your friends, but got the school administration involved too.
If you could get the principal to say something stupid over the loudspeaker, awesome. If you could draw a lewd picture on eraser board with permanent marker, and then make it innocent by adding shapes and lines with erasable ink, mad props.