accelerando
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These gas-powered boots were made for 22 mph
"Gordeyev invented a gasoline-powered boot that looks like pogo sticks that strap to your shins, and they work on the same principle as the air-cushioned basketball shoe."» Instruction For Painful Death #1,232: Wear Power Boots
"The Power Boots use biofuels, such as biodiesel, vegetable oil, SVO, waste vegetable oil (WVO) and 12 inch pistons to propel their wearer up to 25mph and take strides of up to 12 feet." ChaAccelerando reviews
Not one, not two, but THREE negative reviews of Stross's 'Accelerando'; guess the World Transhumanist Association award votes weren't unanimous, then