May 16, 2005 To look at the Pump-a-bike, you’d swear it would sink the moment it hit the water. Not so, indeed, with a bit of practice, the human powered hydrofoil is capable of nearly 20 miles per hour – not that much shy of the world record for human powered watercraft . To make it work, all you need to do is jump up and down. Given some time to coordinate the movements and gain a degree of mastery, the Pump-a-bike can even be used in surf to ride waves.
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