I've only experienced sleep paralysis once in my life. I fell asleep on a bus with my head at an extremely odd angle, so I'm not even sure if it was true sleep paralysis or if I was just on a nerve or something, but when I woke up I couldn't move, not even open my eyes. I knew right away what it was so I just kinda chilled there until I could move again. Odd thing was it affected my hearing too, because I could hear people talking but I wasn't able to comprehend any of it.