When we went to visit my mother-in-law in the hospital, she was talking to someone when we entered the room, but no one was there. When we asked her what was up, she said this man kept coming to visit her, and it was her son or me, and he was telling her that she had to come with him. When she refused, she said he told her it was nice there and she'd like it, but she still wouldn't come in. While we were talking to her, she would say things like 'shut up' or 'leave me alone,' but she wasn't speaking to any of us. This told us that she thought the person was still in the room with us. It was less than an hour later when she died. I'm not sure if she had been hallucinating or what, because she seemed perfectly lucid when she was talking with us, but it sure was creepy.