Related story. Once while ******* in a toilet at an ISU basketball party a former McDermott era superstar walked in and relieved himself in the shower. The houses owner, another former player, came in while he was doing this and hilarity ensued.
Mine was a classic case of drunk sleepwalking. I had been at a party that night and gotten pretty loaded, but not so drunk that I didn't know what I was doing.
Well, I went to bed, and when I woke up, there was a log in the bath tub. There was some arguing among the people there who had been responsible, so we all did "wipe checks" to see if anyone was unclean, and sure enough, I was the one responsible. I have a tendency to sleep walk (have since I was little) and a few too many drinks can really bring it out.
This isn't the first time something like that happened to me either. A couple years ago, my gf and I went out to dinner, came home and went to bed. Didn't really drink (maybe a beer or two with dinner) or anything wild. Woke up in the morning, and my oven door was open, and there was a puddle on the floor below it. Not really putting two and two together, I shut the oven, and mopped up the puddle. I smelled the puddle and it didn't smell like ****, so I kind of forgot about the whole thing.
A week later, my girlfriend goes to fire up the oven, and the aroma of burning urine overpowered the apartment. Turns out I must have been sleep walking, and instead of going into the bathroom, I opened up the oven, took a leak, and then went back to bed.