Christ. An awesome lunatic wasn't happy with just dragging his knee while making a high speed motorcycle turn so he decided to lay his head and drag that on the gravel too. Because, well, there's nothing cooler (or more out there) than scraping your noggin' on the street while going well past the reasonable speed limit of a turn. To be honest though, it does look kind of cool.
The video is older but was recently spotted by Geekologie. You can see the full breadth of insanity below: