Motivational YouTube Vids

What are your favorites???

I love this one:

http://www.youtube.com/watch?v=lsSC2vx7zFQ&list=LLKTVFsp8mB5YgRXRdHEK4lg&feature=mh_lolz

When I'm out running, training for my very fist 5k, any time I want to stop I think about this video and ask myself, "How bad do you want this?"