My brother spent the night at a friend's place, and as sometimes happens the beer he'd consumed decided at 2 a.m. that it needed to leave him. On the way back from the toilet he noticed a shadow on the wall of the hallway that looked for all the world like his friend's late father's profile.

Bro didn't think much of it and mentioned it at breakfast the next day. "Oh," said the friend, "come here. I want to show you something."

There was no light source in the hall from which a shadow could be cast. None. A window at the other end of the hall cast the only light, and that went straight down the empty hallway.

The friend explained that they'd seen the shadow before, in other parts of the house. They figured that Dad was just keeping an eye on them.