All week, no matter where you turned or what you read, everyone was saying how the Patriots would just run up and down the field against the Colts. And even during the first half, the Patriots showed some signs that they were able to move the ball fairly effectively running the ball. However, somewhere late in the 2nd quarter, Belicheck's ego got in the way. It's almost as if he said to himself before the game "I know that this is how I should probably attack the Colts, but I think I'm so good that I can do anything I want, so I'm going to do the complete opposite just so I can say after the game that I can impose my will regardless of who we play." That made it even sweeter to see his pompous "I am greater than all" ego come back to bite him in the ass.
It also helps to have your Pro Bowl safety back in the lineup, which tends to make what everyone considered a suspect defense a little tougher to play against; a fact that nobody outside of Indianapolis seems to want to recognize.