Start watching at about the 46:23 mark. I tried to make it start there, but it starts at the beginning.
http://youtu.be/219YybX66MY?t=46m23s (http://youtu.be/219YybX66MY?t=46m23s)
I thought this was cool.
Rats, I can't see this while at work (all the linked stuff gets filtered out).
Love this guy, every now and then I see him guest speaking at the Franklin Institute in Philadlephia. (although the last time was a few years back)