You are right, the last two minutes of a half the official upstairs in the booth reviews calls. The play in question was reviewed as stated by the official on the field prior to the Steelers coming to the line for the final play.

FYI, for that call to be a incomplete forward pass the QB would have to have control of the ball as his hand began forward. If you saw the various replays the ball and the QB's hand and arm went forward because of the hit from behind. The key is that the QB didn't have control of the ball when his hand started forward.

Had no dog in this hunt, but the call was correct. That said it was a great game, both teams and their fans should be proud.

Every normal man must be tempted, at times, to spit on his hands, hoist the black flag, and begin slitting throats. H. L. Mencken