Well, the refs are there for a reason, and there were a few calls that were just flat out bad. Most obvious was the Packers "incomplete" pass late in the third that should've been ruled a fumble and Packers recovery for a first down, but was upheld even after the replay clearly showed possession and control. As it happens, Mendenhall fumbled at around the Packers 35 on the ensuing drive, and the Packers not only recovered but went on a TD drive as a result, but if Pitt HADN'T fumbled, the Pack was back on their heels after the Steelers had been in control for most of the quarter on both sides of the ball, and a 10 point swing at that or any point would've cost them the game. Similarly, a horsecollar tackle on Mendenhall earlier wasn't called and instead of a big run or a 15 yard penalty Pitt was forced to punt from inside their 20. That's before we get into Ben throwing interceptions into double coverage or putting up jump balls from his own end zone that scored a TD for the wrong team.