Hi,
The scene is the ladies room of a country pub. On the wall is a picture of an apparently naked man. I say apparently, because his middle section is hidden behind a little door. A notice says DO NOT OPEN THIS DOOR.
A lady visits this loo. She is a stranger, just passing, stopped for a drink. So what does she do? She opens the little door. The middle of the man is still obscured, by a notice saying .......
A BELL HAS RUNG IN THE BAR!
602