You probably don't think of bicycles as speed demons, but Arnold Nearcher and François Gissy would beg to differ. They've respectively developed and raced a rocket-powered bike that just broke a world speed record for the vehicle class, hitting a brisk 207MPH. It's not the fastest two-wheeler of any kind, but the acceleration (maximum speed arrives in five seconds) is enough to put supercars to shame. As you'll see in the video, the machine can outrun a light-yet-powerful Ferrari F430 Scuderia without breaking a sweat. Given the dangers involved, you won't be riding a rocket bike on your daily commute any time soon. Still, it's an impressive feat -- think of it as poetic justice for every time a motorist has cut you off while you're pedaling down the street. via Engadget.