I saw some highlights from an NFL game the other day (I think it was Detroit's 22-21 comeback win against Atlanta) and the presenter said they won the game with a field goal.
Their first attempt at scoring the field goal was wide, however there was a flag on the field, due to an offensive foul (delay of game) and they would replay the down with a 5 yard penalty. Of course they then had another attempt at the field goal and scored it.
Now, I know it is possible (only in certain situations?) to decline a penalty in the NFL, so since it's an offensive penalty, why couldn't the Falcons decline this penalty, counting the missed field goal as a failed attempt and ending the game?