How about this one?
There used to be this band up here in Canada called Nero and they used to play in my town every now and again and we had some really fun parties afterward.
Typically some would still be partying in the morning though that never generally included myself. The lady and I woke up one morning at around 9am or so to the sound of broken glass. I jumped up and ran downstairs to see what was going on and found this guy in my living room with his dick in his hand ready to piss all over the side of one of my Mission 783's. Gave him a smack and asked him WTF? Fortunately, he only had a chance to barely dribble on them. No idea what he was thinking but clearly the "real" world did not exist to this guy at the time. Then, he proceeded to piss his pants and out the door he went.
Now that was irritating. Needless to say when I sold my Missions the incident was not mentioned...