BML-20XX said:
Sleep-paralysis sucks. You can't move, so you cry for help, except you can't cry for help either, you just keep softly breathing, wishing you could cry for help. Avoid if possible.
Indeed. It's a scary feeling. Your mind is awake, but your muscles are not. Well, obviously, that's not exactly it, but it sure seems like it.
Interesting tidbit about sleep paralysis - it was one of the phenomenon that spurred the idea of a succubus way back when as an explanation. It was thought that sleep paralysis, as well as tightness of the chest and difficulty breathing while sleeping, were caused by succubi as they fed on your life. It was so unpleasant that the simplest explanation these people came up with was "a demon did it."