Obviously I don't know if that actually happened in the OP but I do know something about Ambien. My wife was prescribed Ambien as a sleep aid about 5 years ago and she started having bizarre dreams and nightmares. One night, after about a month of taking it, I was sitting at my comp at about midnight, she walks into the room with a bottle of cleaner containing bleach in it. She starts spraying the bleach all over the carpet then she gets down on her hands and knees and starts scrubbing the carpet. I'm like wtf are you doing, that has bleach in it. By now the carpet is turning colors and I realize, she has been sleeping for 2 hours and there is no stain on the carpet, its the middle of the night. I look closely at her and get creeped out when I realize no one is home. She is dead asleep, carrying around house cleaners and scrubbing the carpet. After that, the doctor took her off of it. So anyone that thinks Ambien can't make you do stuff you are unaware of, I'm telling you first hand, it can and does. I have no idea if there were nights she stood over my bed like this.