The same thing happened to me about six weeks ago at about 11:00 p.m. (except l live in a house). I can't ever fall asleep before 12:30 - 1:00 any more. Anyway, l was lying there watching television when my bedroom door started being being pounded on, on the outside of my room at the top portion of the door. It was not locked and it scared me. I started yelling "Who's there!". And then it started pounding on the bottom half of the door. I finally got ticked off, opened my door, walked out into the hallway and continued yelling. I checked the locks on all the doors and windows and all were secure. I went back to watching television.