A kid comes running home from school, drops his backpack.
And says, “Dad, guess what? I made 5 bucks today!”
His dad asks, “Really? How’d you do that?”
The kid grins and says, “I didn’t take the bus. I ran home behind it and saved the fare!”
The dad replies, “Brilliant! But why didn’t you run behind a taxi and save 15 bucks instead?”