Crap, I wish I read this post earlier. I had a very similar experience with sleep paralysis. I don't get it very often, and all but this one time I did not "hallucinate".
This was a few weeks or so after I watched the movie Jacob's Ladder for the first time. In the middle of the night, my mind awakens yet my body is paralyzed (sleep paralysis, der). I look around my room...and to my surprise, one of the demons from Jacob's Ladder has decided to pay me a visit. If any of you have seen this movie, then you know how insanely creepy those convulsing demons are.
As usual, I have two option: 1) to try and go back to sleep or 2) try and animate my physical body and fully wake up out of this nightmare. I figure I could scare myself awake, but that didn't work so I spent about a full minute with a friendly demon from hell in my room and no ability to move.
I've also had some fucked experiences with lucid dreaming. Its not always just flying around and having sex......i've seen the dark side. :twisted: