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David studies how to throw a punch and avoid being hit, and learns what happens when a punch connects; boxing champion Bernard Hopkins is recruited to deliver David's first real blow.
David attempts to eavesdrop on his friends and old bosses after learning about inconspicuous listening techniques and receiving pointers from a former CIA operative.
David collects information from a professional cricket player, a billiards shark and two physics professors in order to learn how to properly bounce a ball.