There's a variation of this prank which requires the victim to be drunk - and a fortuitous arrangement of rooms.
A student returned to his fourth storey room in a very drunk state and fell into a comatose sleep. While he was asleep, his friends swapped the contents of his room with an identical room on the ground floor. In the morning, four people with balaclavas burst into "his" room and threw him out of the window. Of course, he thought that he was on the fourth storey and that he was going to be thrown from a great height.
We were having a serious prank war. Then we had a dance marathon, which effectively left my room unguarded for 24 hours.
So the prankster removed all of my furniture, removed my carpet, and put my furniture back exactly where it was.
http://i28.tinypic.com/2ec17w1.jpg
So me and my friend come back, exhausted, and walk in to no carpet. We were too tired to be pissed.
He's now working for State Farm. Soon I will save up some money to rent a billboard in Tallahassee to make fun of him.
Soon, the day will be mine.