Man, if my old RA ever found out that it was I who pulled the powdered sugar prank on his room, he would kill me. Basically, while at Iowa State, I took about 10 lbs of powdered sugar, put it under his door(it was locked, he was out), and then used a leaf blower(rental) to turn his room into a winter wonderland. Luckily everyone else on the floor didn't like him, so I wasn't turned in.