uh, i definitly have, many times i used to wake up on lower floor, and went to sleep in upper floor, i think alot of what happens is people wake up enough to navigate and walk but not remmember. many times i've woken people up enough so they won't agree to lend me large sums of money or even small sums, but agree to other stuff, but then later not remember it at all. . i know i've walked, i used to share a room with my bro, he'd catch me slamming into the walls and stuff.