I've known a few people who sleep talk. My grandma used to be really bad. She slept in my bunk bed once when I was a kid, and was screaming and howling all night like a scoobie-doo ghost. I guess she was heavily abused as a child. Her step mother tried to kill her a few times before they figured out she really was crazy. Have you guys seen the sleep talking man?
Sleep Talkin' Man

I knew a girl in college who would always take off all her clothes in the middle of the night, along with some weird sleep talking. She would have no idea she did it until she woke in the morning completely naked. She quickly became a legend