On the last day we did the classic things (loo paper in the halls, lard on the door handles, wore silly clothes (slightly more effective when you have a uniform)) but one thing we did which I'm quite proud of is we put a tape player in one of the lockers in the back of our classroom and set it on a timer. Half way through 'The Demon's' lesson (EVIL teacher) it went off and there came this little voice from the back of the classroom.

"Hey guys, this isn't funny anymore. Come on guys let me out. Guys. Guys?"

This continued for a minute or so before person began to hum and sing. It was soooo funny. the teacher was looking for the voice for ages, but couldn't get to it becasue the locker was locked! We got a friend whoes quite good at voices to do the recording so you couldn't tell who it was.

Got to do that again some day.