The guy has to be insane.

>(Warning: 11 sec TED ad)
>http://www.ted.com/index.php/talks/arthur_benjamin_does_mathemagic.html
>
>(Verify the math for 457,722 tho...)
>
>he's a professor of mathematics at Harvey Mudd College
>
>http://www.math.hmc.edu/~benjamin/