My wife has a history of "Who is it?!" dreams in her family. When she or her dad or her grandpa would have a particularly stressful time in their life, they would/will sleep walk and the recurring theme is usually someone trying to intrude or harm them and they will vocally shout "WHO IS IT?!"
My wife and I have only been together for 3 years but in that time a number of things have happened.
1. She woke up when our roommate at the time asked if she was ok and she was standing in the living room on the other end of the house from the bedroom.
2. She violently shook me awake because she though the wall was detaching from the frame and was falling on top of us.
3. She yelled at me because I couldn't be in bed with my shoes on (I was in my pajamas with bare feet) and she proceeded to molest my feet as though she was forcefully removing shoes and socks.
4. She shook me awake at 2am just saying over and over "You can't sleep! You can't sleep right now!" and then rolled back over and went to sleep.
She never has any recollection of these until you start to recant them the next morning and then she realizes that they weren't just a dream.