He also has both brake levers stacked on the right bar so he can squeeze both at once,
you know with hydro brakes you can link two or even more calipers together and run them off of 1 lever. you basicly you run a hose from the bleed nipple on a caliper to the other caliper but still have the bleed nipple on it. can mail you more details if you want!! mail in profile.
i used to ride with a guy with 2 arms but he could only use 1 of them (the other had to be velcroed on to his bars) he showed me the set up and i also had to Bleed them.