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Cam Zink and the Mammoth backflip

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Photograph By Brett Wilhelm/ESPN

In preparation for his world record mountain bike backflip attempt at Mammoth Mountain in California, Cam Zink and brother Howie put some final touches into Zink's bike prior to practice on Wednesday. On Thursday, Zink landed a 100-foot, 3-inch backflip on a dirt-to-dirt jump for "World Of X Games" on ABC, adding his name to the Guinness Book of World Records in the process.