Last November, Frenchman Francois Gissy hit 285 km/h (177 mph) on a rocket-powered bicycle
. Now, at the Circuit Paul Ricard in the South of France, he's knocked his own world record out of the park. Dialing in a massive 4.5 kN of thrust, which generates roughly the equivalent of 560 horsepower (418 kW), Gissy took his rickety-looking rocket bike up to a monstrous 333 km/h (207 mph), hitting top speed in just 4.8 seconds and generating about 1.96 Gs worth of acceleration. We had a quick chat with Gissy, who tells us he's hoping his next run will put him over 400 km/h (249 mph) in less than two seconds on a machine he's calling the "Spine Crusher."