Sleep paralysis has only happened to me a couple of times, and that was before i knew what it was which freaked me the fuck out. One time i was dreaming that i was in a swimming pool and that i was drowning and then i sort of woke up but couldn't move any part of my body except my eyes and i was panicking like crazy. Eventually after a couple minutes i was able to break the paralysis and wake myself up but damn that was scary.