I've had these since childhood, never had a "pleasant" one, but apparently I've gotten pretty jaded about them, over the years.
First one I remember, I was lying on my side and facing the wall. Always slept with my bed against the wall, probably a comfort thing. Anyway, I
"woke up" and couldn't move, felt a hand holding the back of my head so I couldn't turn it, felt a pressure around my chest (I assumed it was
something's other arm, which scared the **** out of me, yes) and started to get this strange "buzzing" feeling all over my body.
The date was Nov. 1, and I was 11 years old at the time. Sorta burned into my memory, that date was. Never told anyone about it, just figured it was a
really, really bad dream.
They started up again a couple or so years later. Mostly the same stuff other people have mentioned--evil presence "sensed" (but not seen, until I
was much older) occasionally loud noises, paralysis of course, the weird buzzing sensation (which was sometimes rather pleasant, actually), being
completely terrified, and as an added "bonus," tactile hallucinations as well--hands grabbing my ankles, shoulders, neck, head, etc.
Never in a sexual way (in my teens I might kinda have liked that--had a healthy degree of carnal curiosity for my age, I confess
) ...the "grabby
hands" seemed to only hold/squash me rather like someone running an orange through a juicer, more or less.
The interesting part, though, imho, is the end of those "grabby hands." I had an SP episode in which I could both "sense" and "see" the
"enitity" responsible (an old woman in a shawl or veil, is what I pictured), and it... well, it attached something to the top of my head. Rather
than being scared, I got angry. Deep-down, sense-of-violation angry. I reasoned out that since I couldn't move physically, I'd move
non-physically--grabbed the... thing, whatever it was, yanked it out of the crown of my head and threw it at the figure standing at the foot of my
bed. In the dream or... whatever it was, I told the thing that it had no right to touch me and was not welcome in my home.
Had a few more episodes since then, but no more grabby hands, and no more really scary ones, either, but that could well be just psychological,
imho.
Now, in later years, I've had some real doozies. My personal favorites, for lack of a better term, occurred when my eyelids got stuck half-open so
that I was seeing the room around me while still in the midst of an SP episode.
In one, I was only mildly affected, and amusing myself while waiting for the paralysis to end by glancing around the room. Had a few interesting...
visual misinterpretations, basically, like seeing light from a window as the head of a large white horse, but I wasn't afraid or anything. As I said,
though, I wasn't particularly affected that time, which helped a lot.
In another, the entire back wall of my bedroom fell away and I saw an other-worldly, elven-looking being (white light and the whole nine yards) on
horseback, of all things. I remember thinking "well, grand--I'm hallucinating albino elves, now, what will be next, unicorns?" ...Snapped out of it
as soon as I had that thought, so maybe sarcasm offends the less-scary ones.
Another one that was more amusing than terrifying (like I said, I've possibly just gotten jaded with these things over the years) was the "grey
man." Again, I was having an SP episode with my eyelids annoyingly stuck half-open, and saw this grey shape out of the corner of my eye--kind of a
dirty beige color--and it drifted over to the side of my bed, at which point I could "see" it more clearly. It looked like a small human shape with
a blurry face, like one of the demon-things from the "Jacob's Ladder" movie, and admittedly, I was a little scared... until I woke up, and realized
I'd been terrified of a "blurry little nightmare midget."
Fwiw, I've never been diagnosed with any biochemical issues and am distressingly normal, despite the above.