it's my life

Little Johnny was talking to his two friends,Billy and Dick. Each was bragging about how great their fathers are.
Billy said: "Well, my father runs the fastest. He can fire an arrow, and start to run, I tell you, he gets there before the arrow!"
Dick said: "Ha! You think that's fast! My father is a hunter. He can shoot his gun and be there before the bullet!"
Little Johnny listened to the other two boys and shook his head. He then said: "You two know nothing about fast. My father is a civil servant. He stops working at 4:30,.and he's home by 3:45!"