Each year the NFL playoffs have heroes and goats. The goats then spend the offseason facing criticism and wondering what could have been. Nobody wants to earn the title of goat, but each year someone finds a way to screw up.
Often times, the goat is someone who is considered one of the team's best players. He typically gets the ball in a pressure situation, and this time he fails to convert. It is difficult to predict who will end their team's playoff run, but some players are just prone to mistakes.