| You should also watch “Man does Donuts with '69 Mustang; Hits Self with Shovel.” |
From TED talks: "In a lively show, mathemagician Arthur Benjamin races a team of calculators to figure out 3-digit squares, solves another massive mental equation and guesses a few birthdays. How does he do it? He’ll tell you."

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Also, this man must be stopped. Then studied. I'm going to be thinking about "cookie fission" for days.