I'm not saying the look back cost Street Sense the win, but I was screaming at Calvin to QUIT IT!!!!! Can't he look under his arm like major league jockeys, or how about just putting your head down and riding your ass off to the wire?
I have ridden horses for over 30 years, and while that may not make me a bio-physics expert, I do know that it's all in the rhythm, and his looking back the way he did, would definately be evident to Street Sense, he turned his whole frigging head!!!!