Since Omameh didn't get so much love in the last UFR, I thought I would write this up. Of course, every block on that play was critical, but if you go through the film, the Omameh block stands out. He pushes back the ILB Manti Te'o, #5, and in the process of doing so, Te'o trips up the safety, #22, Harrison Smith. If Smith doesn't get tripped, he makes the tackle and Robinson gains 9 yards instead of 87.
Here are the pics -- in the first one, on the left side of the screen, you see Omameh driving Te'o back and Smith trying to get out of the way (apologies for the blurry NBC video):
Then, you see Smith trip on Teo's back foot:
Smith wipes out:
As you can see, if he had been able to stay afloat, he would have had the angle on Denard, or at least have forced Denard to cut to the sideline, limiting his gains: