New fun prank: Put “Psycho Killer” by Talking Heads in your CD player and hit Repeat. See how many times the song has to repeat before your roommate realizes what’s going on and freaks out.
Currently Mike holds the record; I ran that sucker 14 times and got tired of it before he did. My previous roommate S only needed to hear it start the second time. “Dude, you're sick!” he squealed, and fled from the room.
I don’t even sing along.