We've all witnessed at least one party foul. And the more unfortunate of us have committed them. One minute everyone is happy, laughing and having fun and the next moment someone drops a glass of red wine on a white carpet. Or someone gets too drunk. Or a fight breaks out. The reasons to upset a good time are endless, and they can be pretty entertaining as long as you weren't involved. Redditors have shared their best stories of witnessing things that go from awesome to awful.