i used to have really weird sleep paralysis cases when i was a kid, its hard to describe, but the feeling during those episodes go something like this:
i lie on my side face pressed against the pillow, i cant move nor look anywhere else, everything is pitch black but i can see the outline of the bed and my close surroundings, suddenly the feeling of time flowing starts to "go out of sync", i start to count down seconds and see an illusionary clock in the center of my vision that gradually starts to speed up infinitely while im still counting the time in my head, sometimes the feeling of time goes back to normal, sometimes it infinitely slows down, and it goes on like this for quite a while but it feels like eternity until i wake up