This is like the Zapruder tape. If you watch their feet, and the flag on the ground, it looks like Oher keeps Alexander pretty north-south, running back in a straight line until he's out of the play. The pictures later in the thread seem to back it up. I think Oher does a nice job here.
That 2008 AZ playoff game was probably the most depressed I've ever been after a game, but the 2013 game at Buffalo in Week 2...I can't remember being more upset with how a game ended. That was a long walk out of the stadium. And a long time sitting in traffic. Not fun to be surrounded by elated fans of the other team.