Never shoot a man when he is holding up his trousers.

George Orwell recalls a morning in the trenches during the Spanish civil war, trying to snipe at the Fascists, when: A man presumably carrying a message to an officer, jumped out of the trench and ran along the top of the parapet in full view. He was half-dressed and was holding up his trousers with both hands as he ran. I refrained from shooting at him.