Spanish ultra marathoner Kilian Jornet is crazy. He apparently climbed Mt. Everest twice in one week (although there is some controversy about that claim) and holds the Fastest Known Time for ascents of the Matterhorn and Mont Blanc.
His latest stunt was to race a someone up and down a 1500 foot mountain in Norway with the catch that his competition had a wingsuit so he could literally fly down. Stating the obvious, Kilian says, “he would be quick to climb and of course very fast on the way down.” (via Runner’s W0rld)