i like what he says about his left arm, at the end.. he mentions how his left arm is stiff when he runs but his right arm is fine, he then says "you know why? holding books when I ran to school as a kid" (something like that).
hah.
also nice little demo of how you should "sound" when you hit the ground.
http://www.youtube.com/watch?v=Ab3ZZN3zV9A