I used to beat the hell out of my first husband in my sleep! Not from nightmares, I'd just haul off and belt him, throat chop him, crotch punch (seriously). I guess my subconscious was acting out my feelings because I've never struck out at my current husband.I totally decked my ex-wife once. It was completely an accident though.
I was sleeping and apparently having a nightmare or something. She said my fist were clenched and I was making noises. She said she shook me and I decked her and sent her flying off the bed. I never woke up from it, but I did bruise the fuck out of her shoulder though.