TED: Arthur Benjamin and "Mathemagic."

I teared up at the very end of this one. I was also laughing at the same time. I think it's because I wanted to stand up and applaud the guy. Sorry about giving away the ending. 1 hankie

(I know these posts seem to come in fits and starts, or maybe repetitive as I watch multiple episodes or clips from the same source, but I'm just documenting each time I get weepy as they happen.)