I have had a few experiences of sleep paralysis, mostly in my teens/early twenties. None of them involved anything remotely paranormal. I'll get back to you with answers to the specific questions when I get time, but I just wanted to mention one thing (and I'm sorry if someone else already mentioned it...I didn't take the time to read the whole thread, since it's late and I'm tired). Sleep paralysis is one of the markers for narcolepsy and idiopathic hypersomnia (which I have). The last bad episode I recall was in my 3rd year of college. I was trying to take a nap during the day. Everything was going fine until I decided it was time to get up. I just remember trying to wake up for a while, getting REALLY frustrated that I couldn't, and then finally resigning myself to going back to sleep. I could sort-of look around. It was like looking through frosted glass. I thought I could talk (tried to scream), but i really couldn't. No one heard me make a sound. I fell back to "real sleep" and woke up about a half hour later feeling exhausted. So much for that nap!