It's the age old contest where grown children attempt to demonstrate their manliness by showing everyone they can put their foot down on a gas pedal. No you guys don't understand, it takes some real ankle strength to do that!
The result is pretty obvious but still hilarious. It's just too bad the camera guy didn't keep rolling, he really missed the best part where the guys got out of their cars and compared penis sizes. I guess we'll never know who really won, but our hunch is the one on the right who seemed to be overcompensating just a hair more.