2011–12 NFL playoffs – Wikipedia

Overtime rules. This was the second postseason that the modified playoff overtime rules were in effect. Under these rules, instead of a straight sudden death, the game will not immediately end if the team that wins the coin toss scores a field goal on its first possession (the game will end if a touchdown is scored by the offense or if the defense scores a safety on the first possession of the …

https://en.wikipedia.org/wiki/2011%E2%80%9312_NFL_playoffs