Former Bears and current Lions running back David Montgomery took to Instagram to share his reaction to his offensive coordinator leaving for Chicago, and it was pretty hilarious.

That Johnson would leave Detroit was really just a matter of when—not if. He was heavily pursued over the last two coaching cycles after transforming the Lions offense with a on

The Bears officially announced the hire of Johnson on Tuesday. Johnson had helped build an explosive offense in Detroit. Over the last two seasons, no unit has averaged more points per game (30.1) or net yards per game (402.2) than the Bears under Johnson.