They say Ambien makes you do all sorts of really strange things that you normally wouldn't do without being on it. For instance, there was one guy who went to Reddit to confess a little secret about his recent engagement. Turns out, he wasn't really planning on proposing to his girlfriend. It was the Ambien talking.
He said that he was having trouble sleeping, so he ended up taking 40 mg of the sleep aid, which is quadruple the recommended dosage. He woke up and his girlfriend had a ring on her finger and his Facebook status was changed to engaged. He didn't remember any of it. His plan was to wait at least another year and a half before proposing. Ambien just sped things up a little.