There's no reason Farve should have even had to throw the ball on that down anyway. The 12 men on the field penalty before that was the biggest "choke" of the game.
Think what you will of Favre, that guy laid it all on the line that game and he took a beating like I've never seen a NFL QB take. If you haven't ever seen pictures of his ankle, you should see (google) them just to appreciate what he played through.