2012 BMW M5 video screen capture

By all accounts, the 2012 BMW M5 is nothing short of a mechanical miracle. With two fewer cylinders than the previous generation, the big bruiser manages to retain the acceleration and handling prowess that M buyers have come to expect. But where exactly can you use the full breadth of the four-door's 560 horsepower in a safe and legal capacity? The Autobahn, that's where. One enterprising soul recently managed to point the long nose of the M5 toward the horizon on the German highway system, planted his foot in the carpet and held on all the way to 300 kph.

That's a shave over 186 mph for those of you too disinterested to fire up your calculator, and impressive momentum in any vehicle, let alone a bone-stock family cruiser. Hit the jump to check out the video for yourselves. Just remember not to try this sort of insanity at home.