Computer Breakdown

Go to the computer lab at your school when no one is there. Get a paper clip and straighten it. Find were the computer's fan is and stick it through. This will cause the fan to stop working and the computer to overheat and stop working. Nobody will know what the problem is and they will call someone to fix it.

Damien: Nice one. Another variation of this prank is to stick a folded piece of cardboard in to get the bicycle wheel 'card in the spokes' effect.