Two men were in a forest, when a lion came roaring towards them.
One of them throws sand into the lion’s eyes and then runs. The second man stays, unmoved.
The first man looks back and shouts, “Why are you not running?”
The second man replies, “Why should I be running? You’re the one who threw the sand. “
This joke is included in the Black Book of Jokes. You can order it from here.