Had one such experience. The entire time it was happening, I kept trying to convince myself it wasn't real, but then something would happen that would make the experience feel even more real.
For context; I usually sleep facing the wall next to my bed. So when I "woke up" I could see the wall in front of me, but I couldn't move, initially I freaked out, but I managed to calm myself down a little. That is, until I heard something behind me, like a man snoring through a distortion filter, except constantly inhaling without exhaling, I also saw it's shadow rising on my wall, and it looked humanoid, but my eyesight is too poor to notice any other features.
Again I constantly tried to calm myself down. I keep telling myself it's not real, that it's just some shadow of something on my desk, and the sound is from leaving my fan or computer on or something. And for a while the shadow does seem to stand still, like it's just some static object, but then I felt that thing crawl on top of my bed, I even felt the bed cave in, and felt myself sink backwards. I saw it's hand('s shadow) above my head as it slowly elongated one of it's fingers and sunk it into my ear. It felt as if I'd jammed a Q-tip too far into my ear, and could feel the pressure on my eardrum. One moment I could feel the pressure, the next moment it all disappeared, and I could move again.
I never felt myself opening my eyes. I still don't know if that was all in my head, or if that was real. Before I had that waking dream, I had an actual dream, the most vivid one I've ever had, in which some people close to me were acting weird, and just before I "woke" up, their eyes turned into a mirror-like silver, as they expressionlessly stared at me.
Ever since then I've never had sleep paralysis, or vivid dreams. It's even a rare occurrence for me to remember my dreams, even upon waking up; I do try to keep a dream-journal, but pretty much every day I wake up, look at my dream-journal, and wonder what I dreamed about, if I even dreamed at all.
The skeptic in me thinks I imagined it all, and that my subconscious just disconnected my conscious (somehow) from my dreams, since it freaked me out so much. I've tried all sorts of supplements/drugs/techniques to help myself have more dreams, but to no avail. The part of me susceptible to woo-woo thinks I got fucking ear-raped by a demon, and part of me can't help but think I might be possessed.