Dangerous sleep behaviors?

Occasionally, while I'm asleep, I shout things, thrash my legs in a running motion, and even hurt myself, ( the other night I punched myself in the head over and over until my husband woke me) I have no recollection of my dream and feel almost drunk when I'm woke up. Why do I do this and what can I do to stop it, I'm worried I may seriously hurt myself or someone else. please help