One night, as some of us sat downstairs enjoying mushrooms, we had one of those fabled shared illusions that our ceiling was exploding and bulging. Then a foot appeared through it, followed by room mates face. He cursed, then another room mate's face appeared, and he cheered.

It turned out they had argued over which downstairs room a bedroom was above, so they ripped up a floorboard and kicked the ceiling through.

[source](http://www.reddit.com/r/AskReddit/comments/6qcwnx/what_are_your_roommate_horror_stories/dkwaew7)