Tricking is a related to parkour though it places a much higher element on flips, kicks, and spins. It's every awesome move you've seen in every great kung fu movie amped with a dose of adrenaline.

This amazing video shows Vellu, a top practitioner of the form.

I love extreme sports that require nothing but a flat spot of ground.

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Shea Gunther ( @sheagunther ) is a podcaster, writer, and entrepreneur living in Portland, Maine. He hosts the popular podcast "Marijuana Today Daily" and was a founder of Renewable Choice Energy, the country's leading provider of wind credits and Green Options. He plays a lot of ultimate frisbee and loves bad jokes.