I used to sleep walk when I was a kid and would sometimes go up and talk to family members---not making any sense, of course. It used to freak me out to wake up in the living room or in my parents room, when I went to bed in my own room.
As an adult, I don't do anything particularly strange when I sleep. However, hubby tells me that, on cold nights, I'll roll over and wrap all the covers around me, like a window-shade--leaving him without so much of an inch of the quilt.
Lately, I've been waking up with both my arms draped over my head, like I'm pushing my head down. Not a good idea, as it causes quite a sore neck from all the pressure.