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The Taiwanese bicyclist Wang Nan AKA "Tainan Tony Stark" spent three weeks engineering this fine piece of work. With a small bottle of gas, the thing was able to get 30 seconds of jet propulsion and hit over 80 mph. Local authorities had trouble finding a way to fine him, but ended up citing a law that demands keeping slow moving vehicles in good condition. In the end, he got fined around 6 dollars USD.