That was me, DISUNC...don't worry, at $90, it's a good enough incentive NOT to do it. I don't even need any theories....My neighbor did it this January, and she said her feet got so cold running she couldn't stand it...then after thinking about it for about a week, she decided that she had her shoes tied too tight...

(she is a little kooky-remember mom who lets DNB8-doggone neighbor boy-8 yrs- shoot off fireworks by himself...yesterday he was HOLDING a roman candle while it was shooting balls of fire out of the end...OY....)
I don't even know who I am kidding, I could NEVER run 13 miles, the best I ever did was about 10 years ago, 15 pounds ago-5 miles without stopping...although my neighbor says a lot of people combine running and walking...