I don't sleep walk at all, I don't toss and turn a lot, if I fall asleep in one position, I wake up in the same position. But my brother, cousin, and friend all sleep talk and it's HILARIOUS.
Once when we were like 12 my cousin woke up, looked at me, flipped me off, said "where is it motherf*cker" then went right back to sleep LOL! Then he never remembered it the next day and he didnt believe me.
One time my friend woke up in the middle of the night (he fell asleep at like 11 for some reason) and he just started cussing. He was looking straight at the ground and must have said about every word in the book. I laughed so hard, then he said "shut up man you don't know what you are talking about!" then went right to sleep. Again, he laughed about it and didn't remember.
My brother just mumbles and nods his head at you like we are having a conversation. It's funny cuz he will say gibberish then have a few real random words mixed every once and a while like: "mhdfvjsgshfh dog jfgjgb ball rfjbgsgg pony" haha