Little Johnny and his friends were bragging.
The first one said: "Well, my father runs the fastest. He can fire an arrow, run to the other side and catch the arrow with his hands!"
The second one said: "Ha! You think that's fast! My father is a hunter. He can shoot his gun and catch the bullet!"
Little Johnny listened to the two boys, mulled for sometime and said, "My Dad the fastest, he's a civil servant. He stops working at 4:30, but he's home by 3:45!"