Aaron 'Wheelz' Fotheringham, Wheelchair Freestyler, Is Defying The Odds.. And Gravity (VIDEO)

When Aaron "Wheelz" Fotheringham misses a landing and crashes, he asks himself one question: "Is this wheel life?"

The 21-year-old wheelchair motocross athlete has quite a sense of humor, which he showcases perfectly in the extreme video above.

Fotheringham, from Las Vegas, was born with spina bifida, according to his website. But he's never let his condition slow him down.

He's competed in BMX freestyle events, and he's also one of the star athletes at the action sports show Nitro Circus Live. He thrills fans with his double backflip, a move that he was the first to pull off amongst wheelchair athletes, according to the Telegraph.

"Aaron has a passion for what he does -- not only is it fun, but he wants to change the world's perception of people in wheelchairs," his website states, "as well as helping everyone see his/her own challenges in a new way."