Falling out of sleep i hit the floor.

i am able to pass out anywhere.  i can fall asleep on command.  Christmas morning, at Mothers house, after going potty about 3am, i fell asleep washing my hands.  I rarely wash my hands.  i talk in my sleep, walk, smoke,  I've eaten.   i once got myself into a coma in my sleep and woke up the hospital.  terrible.  terror.  
The newest phase i am going thru is sitting up in my sleep and staying that way.
As if i am sitting up from a bad dream, but after i acknowledge that it was a dream, and i am relatively safe, i stay sitting up as i drift again.  Wake up a few hours later with a stiff neck wondering how i got that way.  how DID i get this way?  how did any of us get this way?  i have to get away.
I stay in my pajamas as long as i am able to.  i work overnights to allow me to stay jammied.  having no shame allows me to shop in my bathrobe, walk the dog in over sized Jesus and Mary Chain t shirts and hot pants.  Slippers and sweatpants to the bank?  no duh.
i keep a pillow in my car for spontaneous naps.  nap with me.  cuddle up.