Making a Dirt Dog, Vol. 5: My Bike Draws Blood

How is it possible to rip open your knee without moving, or even getting off your bike? Two words: Track stand. It's a helpful trick for learning bike control, but best not attempted by a klutz.

Source: http://www.wired.com/playbook/2012/12/making-a-dirt-dog-vol-5/

ARIAN SEMICONDUCTOR EQUIPMENT ARROW ELECTRONICS ASML HOLDING ASUSTEK COMPUTER ATandT