No, and I unfortunately have knowledge in that area. A very good friend of my family got up in the middle of the night, kissed his wife and told her he loved her and then went to another bedroom and sometime later shot himself in the head. He had been suffering a lot of mental problems and insomnia and had occasionally been sleeping in the other room, so she didn't think anything of it and went back to sleep. She didn't hear the gunshot, either.
That's interesting and tragic. It goes to show you how perception really can be counter to reality.