i did alot of good pranks but the best one was done by my brother and his mate!

He and his friend found a window they could get true on the roof of the highschool without setting off alarms or anything, they'd climb in and get chalk and one of them would like lie on the floor and the other would do a bodyline around him! they'd go around every class and do funny postions up against the boards and walls, tables etc and do chalk outlines of each other as well as doing outlines of there feet up and down the hall! no one could figure out what was going on and this big rumour about a ghost in the school got started and my brother loved it so he kept getting baked with his mate and going back and doing it! and never got cought, the rumour of the ghost of "unnamed" high school is still going around haha