A cool red and silver Japanese superhero from Nebula M-78, the Land of Light, who beats the everliving crud out of big rubber monsters. Since 1966, there have been some 16 spinoffs and counting.
1.) An insanely bad-ass long run that tests the mental toughness of the world's finest athletes; A supreme test for athletic prowess
2.) the hardest thing a human can do
3.) a run longer than 26.2 miles, although most "ultras" are 50 miles, 100 miles or 100+ miles
"He ran an ultramarathon, you've only climbed Mt. Everest once"
"There are more HarvardPhd's than Ultramarathoners"