Thanks for the answers, guys.
BTW, when the condition occurs in my arm, I AM usually sleeping with them tucked under my pillow… probably should stop doing that.
Well, the first time that happened to me I was in a mental hospital. No, really. It was an old converted TB Hospital and I was 15. (yes I was a wild child.)
I woke up my second night there after having a nightmare about all the dead TB patients who may have died in that very room. I slid my left hand under the pillow and felt a cold hand! I pinched it and nothing so I grabed the hand and pulled REAL HARD! and ended up throwing my skinny ass onto the hard tile floor.
It still happens from time to time.
Osip