Those Damn Demons

Finally got to see "The Exorcism of Emily Rose." I was anxious to see this film when I first heard of it, as I knew it was a dramatization of the attempted exorcism of Anneliese Michel, who died when medical attention was withheld during the ritual.
When I was a kid, one book I constantly borrowed from the library was "Mysteries of the Unexplained," a Reader's Digest book. It covers everything paranormal (up until about 1980, that is). I found a copy in a used bookstore a few years ago, and I still enjoy thumbing through it once in a while. One of the stories in the book that always haunted me was a short article about Anneliese, and I remember how tragic it seemed that this girl died in the grip of Satan.
Anyway, I told you all of that to tell you this: there was a scene in the movie——very well done and very scary, by the way——that brought back a chilling memory for me. Go lock your door and read on:
One night, about 6 or 7 years ago, I was in bed with my wife, and I woke up, unable to move. I could move my feet and hands and head, but it was as if metal cuffs restrained my legs, arms and neck. I felt a heaviness on my chest, as if someone were sitting on it. Indeed, at first I suspected that one of our cats might have been curled up there, but the cats—perceptive creatures that they are——were nowhere to be found. I struggled against my invisible bonds, but I was pinned to the bed. Oh, and no, I was not asleep. I have 34 years experience in sleeping and being awake—I know the difference. I began to panic, a state of mind I rarely experience. My hands and feet fluttered around helplessly. I tried to lift my head, and I felt something pushing against my mouth. I attempted a scream, but all I could manage was a muffled "mrrrrgh!" against the invisible hand muzzling me. It was enough noise to wake up my wife, and when she shot up awake, the spell was broken. I caught my breath, and didn't sleep so well for the next few nights.
I can't tell you what caused it, whether it was some odd brain activity or dark forces. All I know for sure is that it happened and scared me silly. One thing I did realize afterward is that what I experienced was a drop in the bucket compared to what poor Anneliese had to endure. I would guess that people under such a strange influence don't much give a shit what's causing it, they would just like it to be over.
If you have a similar story, I would love for you to share it.