I did all the time, which is double freaky.
I just do not actually get up out of bed. I will be asleep and then WHAM! I am awake on the fucking floor in pain. According to the fiance she has seen me sit up, toss my legs out of the bed and then just fall foward.
So now I make sure my chair is attached to the side of the bed so it is in my way.
Stupid fucking dreams....