You could tell by Brady's body language he knew that he ed up. Belicheat referenced the tuck rule, saying it was called earlier in the year on Testeverde. But in that situation, it at least looked like Testeverde was trying to make an incomplete pass. Brady just got ing drilled and blindsided.
Tuck Rule has to be the worst call in professional sports in 20 years. I can't even think of number 2. I'm no Raiders fan, just that call was absolute bs. Patriots got lucky though, they were riding that post 9/11 jingoism, same thing that got patriot act passed, so Brady dodged a huge bullet. I can't even think of that call being used since then, at least not in a situation where the QB clearly fumbled the ball.