Who's the fastest?

Three boys are boasting about their fathers.

The first one says: "My father runs the fastest. He can fire an arrow and start to run, and he gets there before the arrow."

The second one says: "Ha! You think that is fast? My father can shoot his gun and be there before the bullet."

The third one listens to the other two and shakes his head: "You two know nothing about fast. My father is a civil servant. He stops working at 4:30 and he is home by 3:45."

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