Good thing I don't sleep walk, I would be scared as hell if I occasionally woke somewhere else.

Anybody ever experience sleep paralysis?
"Sleep paralysis occurs when the brain awakes from a REM state, but the bodily paralysis persists. This leaves the person fully conscious, but unable to move. In addition, the state may be accompanied by terrifying hallucinations (hypnopompic or hypnagogic) and an acute sense of danger." (http://en.wikipedia.org/wiki/Sleep_paralysis)

It's happened to me once, I was fully awake, but I could not move, fortunately I didn't get any hallucinations. My friend however gets sleep paralysis often and says he seen some crazy stuff.