Here's a story I heard about a practical joke played at one of the dorms at Indiana State (which I gather is, technically, a University.) Two guys living at opposite ends of a long hallway in this dorm started the practice of a rolling bowling ball down the length of the corridor late at night. It would go rumbling, bouncing, and banging down the hall past the counsellor's door, and he was getting rather upset. He hadn't been able to catch the guys in the act, however, as they'd just duck in and out of their doors as necessary to release or retrieve their projectile. The guys knew the counsellor was going to nab them though, so one night they made a pre-emptive move. They took a blow torch and heated the bowling ball to a very high temperature, and using thick gloves let it fly down the hallway. The cousellor was waiting, and as soon he heard the ball he jumped out and grabbed it. He grabbed it with bare hands however, and was immediately dancing around clutching burnt hands instead of the ball. But I gather the midnight bowlers took mercy on him after that, and didn't roll any more balls.