Uh... No stuff but we did a prank that I can't go into detail here... I'll just say it involved a pocket knife, 16 plastic ice cubes, 2 ferrets, a stuff load of chocolate, a matchbox, and 2 copies of the final Harry Potter book.
Something I CAN tell you is that one year a senior dressed up as Chewbacca and ran onto the field during a football game. He scored a touchdown and then did the thriller dance in the end zone. He then continued to play through the whole game dressed as Chewbacca than when we won he dumped the water cooler on coaches head. stuff load of fun to be involved in but I'm not sure what the people watching thought of it.