Win Probability Change: +6.48% | Win Probability After Play: 31.70%

Remember that Boswell missed field goal earlier on? Yeah. That pretty much killed all the gains the Steelers made on a drive that culminated in Williams' five-yard plunge.

At the start of the drive, the Steelers' win odds were 19.83%. They slowly chipped away at that, picking up a crucial first on a 16-yard completion from Roethlisberger to Eli Rogers on 3rd and 10. They worked their way down inside the five, again needing to convert on 3rd down. That's when Williams capped off the gorgeous drive with some nifty moves.

This means that the Steelers' win probability had risen almost 12 percentage points in the course of one drive, only to have Boswell lose roughly half of that with a missed extra point. Back-breaking? No. But deflating? You bet.