Have two good ones. Holiday party, we are at this couples house, guy gets HAMMERED about 9:30, by 10:00 he's passed out on the couch. We going about our business just mingling and the like. All of a sudden, dude pops up off the couch, whips it out and starts peeing on the carpet in the middle of the living room in front of everybody. Now to the best part. Out of nowhere here comes his girlfriend running full sprint. Runs over to him and sticks her cup under the stream and starts catching the "tinkle". I don't know who took the worst of the ribbing over the next month.
Another time, we were in college and we had a friend come up to stay with us, and he got jacked up, we lived in a two bedroom apartment, and he was out on the couch. Well middle of the night, I hear all this crackling noise. Sounded almost like a campfire popping. So I come running out of my bedroom, and he is just hosing down the back of my kitchen trying to pee in the trash can, the crackling was the piss hitting another trash bag already full sitting next to it. So I just mumble and go back to bed, thinking I'll make him clean it up in the morning. So next morning I come out and my roommate is wading around in it barefooted trying to figure out why the dishwasher leaked all over the floor. Man was he pissed when I told him.