Maybe you dozed off? I had a dream like that I complained about to my therapist, where I was in an empty airplane bay and the plane tilted sideways and we all went that direction and all the luggage, etc. was falling on top of me and really really pi&*ed me off :-) I had no control.

You weren't doing any climbing up/down during the day were you? When I do any hill climbing I jerk going to sleep, keeping myself from falling (like when one walks down a hill). Any too many steps or anything?