Riddle: There was a soccer player playing in a soccer field. He was the only one there. The next day he was found dead lying next to a knife and a broken glass. Which one killed him?
Answer: The broken glass. (He drank a beer, threw it on the ground, he went to try to kick the soccer ball, stepped on the glass, it broke, he tripped, fell, and some glass stabbed his heart, and died).