Earlier this morning, I talked about how I think Devin Hester (and, by extension, the performance of the Colts' special teams on Bears KR/PR) will be the biggest X-factor in the game. Yes, even more than the Sex Cannon, Rex Grossman. Here's the question for discussion/debate this afternoon: In your opinion, who (or what) is/are the biggest X-factor(s) in the game? Don't forget to offer up at least a little backup analysis of why.
(Tell you what: It won't be K-Fed. Seen his ad yet? Here's the link. He's such a schmoe.)