Originally Posted by
kudude
sounds like a great idea to me. whoever suggested the submerging the pump was on the right track. A slightly "less cool" thing to do might be to pull the seat tube and fill his frame with water. I'm guessing the reaction to that might be a big stronger.
i'd be pissed if someone filled my frame with water.
okay, mark where his seatpost is set (so you don't screw up his seat height), and then take it off. tie a washer or other small, hard object to a string, and then tape the string to the inside of his seatpost. let the washer hang into his seat tube, reinstall seatpost, and watch him go nuts trying to figure out what that noise is on your next ride.