All I can say about that guy is WOW!!! Now that's dedication!! I'm going to think of David next time I run a marathon! 26.2 miles is a cake walk next to what this guy does! Thanks for posting, I could watch this over and over!
OMGOSH this guy blows my mind every time! But somethings he says are so true! Like once you decide you're going to push through, your body & mind gives you a few extra miles! and I love what he says about visualizing yourself doing things.. "If you can see yourself doing something, you can do it. If you can't see yourself doing something, then usually, you can't do it."