Wait... is that me? RUNNING?

Yeah, I know, a photo of me actually running may seem like a photo shop miracle, but I promise it actually happened.

This photo can be explained by one thing: MAGIC.

Alright, just kidding, but the reason my knees are bent can be explained by Rotational Inertia. Runners bend their knees when running because it lowers their center of gravity closer to the base of support making them harder to push down, and in a sport like Lacrosse some contact is  possible. Also, by bringing mass closer to the center of mass rotational inertia decreases meaning the ability to spin increases. And hey, you need to be able to make those quick turns!