In a nut-shell the guy is a really amazing ultra runner, a bit of a head case and possibly one of the fittest runners out there!
So far he has:
run 50 marathons on 50 consecutive days across the 50 states of the USA.
Run a Marathon to the south pole in -40c
Completed a non stop 262 mile run and also ran on a treadmill for 24 hours in Time square!
I read his book last year "Ultra Marathon man" and it gave me the kick i needed to run my first 50k (which I had to do solo because there no 50k's here in Ireland!
The interview is on the site (endurancesource.com) and it's definitely worth a look if your interested. The man is an animal!:d