Man-made BMX super ramp - Sebastian Keep Quarter Master

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Towering at twice the height of a double decker bus, British BMX rider Bas Keep has built and ridden the biggest dirt quarter pipe ever made, which reaches 26 feet above the ground.

In this clip, Bas is joined by Ben Hennon and Ruben Alcantara as they reach heights of more than 45 feet on a BMX. The project took around four months to complete, and the idea to build the quarter pipe came to Bas around five years ago when he approached Red Bull with a sketch drawn on a piece of paper.
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