Originally Posted by Hack
Well, I can tell you that I have done that. Sometimes when coming home dog tired I can sit on the porcelain throne, and wake up in the same position.
I've done it myself, actually, though with a defecation, not a urination. Woke up and couldn't move--my legs went to sleep, too.
That was, well, "interesting" to extricate myself from, lol.