A: My son broke a window yesterday.
B: How did he do that?
A: He said he was practicing his pitching.
B: He was pitching against the window?
A: No, against the side of the house.
B: If he missed, he's not a very good pitcher.
A: No, but he's pretty fast and can run long distances.
B: How do you know that?
A: I chased him when I found out he broke the window.
B: Well, you contributed to his training.
A: As his coach, my fee is three months of his allowance.
B: What a coincidence! That's enough for a new window.