The first time I saw Jason Griffin fly past as I watched the Pro Singles class rip around the Indy Mile, I did a double-take. Did I really see what I thought I just saw? A rider missing an arm? On the Indy Mile? When Griffin came around during the next lap, I focused my camera on him and hit the motor drive to click off a half-dozen shots. I immediately hit the review button on the camera and, sure enough, there it was, clear as day: Rider number 23C, who was flying around Indy’s turns three and four as fast as anyone, was missing his right arm. I stood there in disbelief. How could a rider with just one arm race a Pro Singles bike around the Indy Mile? The concept didn’t seem to compute.