On a bicycle. Jet powered.
From the YouTube website:
On November 7th of 2014, on the famous Circuit Paul Ricard located at Le Castellet in South of France, François Gissy has reached an incredible speed of 333 km/h on the rocket-propelled bicycle designed by his friend Arnold Neracher. More than 300 km/h on a skinny and completely stripped bicycle, this is amazing, and crazy! Who thought that one day a daredevil on a bicycle, with a rocket under the saddle, could travel the quarter mile in less than 7 seconds?
They do list a project website but it looks really strange and has nothing to do with the bicycle - I would avoid. Looks like a Hydrogen Peroxide engine - efficient and very safe to run; good choice.
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