At a recent Bears training camp practice, an assistant coach is helping defensive backs locate the football during a fumble drill. As a ball is rolled behind them, the cornerbacks and safeties participating in the exercise must turn around, locate the ball and fall on it as quickly as possible. Every few rolls, a player will find the ball quickly before picking up and running with it. When that happens, observers in the crowd cheer, as if the defender had recovered a fumble and was streaking down the sideline towards the end zone for a touchdown.