[...] Stoup has already made several trips to the South Pole. Last year he was one of three marathon runners to run 26 miles to the pole after being dropped off by helicopter.

He's one of about 100 people who have skied across Antarctica from the coast to the pole. He's climbed the continent's highest peak, and snowboarded down another of them, a feat captured by filmmaker Warren Miller's latest extreme sports movie, Storm, now playing in movie theaters.

"I've done some stuff down here," he said. "So I'm not just a crazy lunatic."