Riddle: A man is found dead at the end of an alley. A detective who enters the scene sees the letter X and immediately knows who killed the man and why. How did the detective know?
Answer: This was a bowling alley, and the man who died was a pin spotter. A player had a strike and was to bowl again, but he bowled too soon before the pin spotter was clear. The X is on the score sheet and this tells the detective the name of the bowler.