When i stopped him he was confused as could be and didnt know why he was in the kitchen. I was cracking up.... Had i not been awake to see and stop it however... it would of made an interesting conversation in the morning.
I did that once in the middle of my own damn living room, at the ripe old age of 30-something, after *ahem* "falling asleep" on the couch after coming home from playing a gig at a local tavern. My roommate, who was playing video games at the time, was not nearly as amused as you were, when I suddenly awoke, hauled myself off the davenport and stood tall in front of the TV and ... welll....
"HEY!! Knock that off! Put that away!!! WTF are you doing, you idiot?!?"
"Umm... what? Oops. See ya."
Apparently, I somehow managed to reel it in and stumble to the bathroom, and deal with the whole takin'-a-leak thing in a reasonably civilized manner behind a closed door, and not actually piss on the floor or any innocent bystanders. The details are a bit fuzzy, but that's what I was told.
It could be worse, though... my rhythm guitarist from the same time once (sort of) woke up in bed with his wife after a show... stood up in/on the bed... whipped it out and proceeded to pee all over her, the headboard, the bed, the blankets...
She was not amused. At all. Not even a little bit. In fact, one might say she was pissed off about it. Ho ho!
Shockingly, they are no longer married.
I blame it all on the rock'n'roll.