This is awesome, makes me wish I'd had a camera back when I was 14. In boarding school we clingfilmed one guys half of a dorm room, then did his room mates stuff in Christmas paper ( they shared the same birthday so we went to town on them). They did get their revenge but as we blamed it on someone else we got away scot free. The poor bugger we blamed it on got all of his clothes Frozen then put in on the fire escape below freezing. Guy gets back to find that his socks are one frozen ball and all his shirts, still on hangers are perfectly frozen hanging outside.
His retaliation was even better. We used to put cups of water upside down on ppls desks so they will almost always pick them up soaking everything. So we once again pass the blame onto someone else and watch as this guy who had soaked me and my mates room the week before with a fire extinguisher ends up with up turned cups of water, we are talking about 50 of the things on every available flat surface in the room. took him hours carefully removing them all.
I have to say bravo, as that is an amazing effort with the foil. And following up on other's comments was there a vid of the reaction, as that is always the best part of any prank.