He goes to a technical school and learns how to fix cars. The final exam is to take a working engine, take it apart and reassemble it in working order.
After completing the test, he gets the results in the mail: he scored 150 out of 100 points. He calls his instructor to make sure there wasn't a mistake.
"No mistake," says the instructor. "I gave you 50 points for disassembling, 50 points for reassembling and extra credit for doing it all through the exhaust pipe."
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