Going back up the page to sleep paralysis. I have suffered with this. I never thought that i was being pinned down. It just proper shits you up. My experience of it for about the first year was i'd wake up just as i nodded of and my whole body would be taken over by a buzzing sensation, and your powerless to do anything, feels like your gasping for breath and cant breath. funny thing now i know about it, it doesn't happen anymore. I used to dred going to bed as i could feel an attack coming on.