Steam Boat Willy – Human Powered Hovercraft
Comments (1) Here’s an interesting idea for a workout: A hovercraft made by the guys at a flight group from the University of London:
I dunno how it really works, but if you have to pedal so the hovercraft keep inflated, just throw yourself with one of those in the middle of the ocean (shark infested area for added effect) and you’ll have those dream abs and rock hard legs you always wanted in a few days…. 
Source: Gizmodo
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Themocracy