While in college, my sorority sisters and I would "raid" a fraternity when that fraternity was having an exchange with a sorority from a neighboring college. We would turn all their showers on hot and dump macaroni noodles on the floor, saran-wrap the toilets, and vaseline the door knobs. We would also fill old 33 1/3 album covers with baby powder, slide the opening of the album cover under the door, and then jump on it... result: baby poweder all over the room. Much, much fun!
We used to do that with shaving cream! It was unbelievable how far you could shoot that stuff out of the album cover.