"A great example was during last year's Super Bowl. Carolina scores early in the 4th quarter and Fox decides to go for two and they miss. If he had opted to kick the extra point Vinatieri's late field goal would have been to tie the game instead of winning it"
I've heard that repeated by the pundits, but with the final score of 32-29 I don't see how that would have changed the outcome.
Here's how. If Carolina kicks it the score is 21-17 Pats. Carolina scores again and it would have been 24-21 Cats. Pats score again to make it 28-24. Cats last touchdown would have made it 31-28 which means Vinatieri's field goal ties the game.