My daughter was on a business trip, and about midnight there was this thump-thump-thump-thump-thump on the wall of her room. She knew what that was... heh heh..!! It went on about 10 minutes. She thought "hmm... good stamina!"... then it went on another 10 minutes. She was thinking "can't he get off YET?!?!". Finally it stopped. Next morning she was leaving her room, and glanced at the door to the adjoining room the one all that noise was coming from. It was the motel laundry - some guy must have been drying his sneakers.....