Scenario 1--A team is at the one-yard line on first down. All they have to do is punch the ball into the endzone for the win. They have a running back who is a proven commodity, and four tries to get it in. They opt to pass on first down, hoping to catch the defense off-guard. Interception.
Game over...New England beats Seattle in the biggest football game in the world.
Scenario 2-- A team has just scored and come within one point of tying a game and sending the game to overtime with a PAT.