Post SuperBowl hangover
Not in the literal sense -- I didn't touch a drop of alcohol yesterday. But throughout New England people are grabbing their heads and moaning at the loss of the Patriots at the hands of the Giants yesterday. They were a team of destiny! They were undefeated! What happened?
Near as I can tell, they got a taste of their own medicine is all. They were outplayed. They fought valiantly, there's no question -- that's why the score was 7-3 up until late in the game. Both team's defense turned up the heat. But in the end, Eli Manning was able to make the best out of a few crucial plays, and Tom Brady wasn't, and that's all there was to it.
Bostonist has another theory.