During the last seconds of the 2015 AFC Championship (Broncos vs Patriots), the ball was intercepted by a Bronco, and while the guy was running, he accidentally fumbled the ball and the Patriots recovered.
However, the Patriots still had to do an onside kick.
My question is why? Why didn't the Patriots get 4 new downs?
I am kind of a rookie and not a fan of either team but this really bothers me.