That "fumble" was probably the worst call I've ever seen, on so many levels. First the ball comes out of his hand and Cutler's hand is going forward WITHOUT A BALL IN IT. Second, the ball goes BACKWARDS, so there is no way that Hoculi should interpret that motion as throwing a forward pass. Finally, Hoculi blows a whistle on a questionable play - if he had let it play out, they could have gone back and reviewed whether it was incomplete or not (like in the Snow Bowl).
It's sad that a team can get robbed based on one guy's incompetence, but then again we are Pats fans and we see this against the Colts every time we play them.