My dad talks a lot in his sleep, and as my parents don't use their bedroom and sleep in the living room, I hear it all because my room is beside the living room, and it's really annoying whenever I'm trying to sleep for school, or sleep in on the weekend, he likes to fight people in his sleep, and one time I made the mistake of restraining his arms and screamed "Shaddup!" It ended with me being pushed away and him still swinging.
It may seem dangerous, but it's not, I promise!