Lions were up 23-6 before a Detroit 4th quarter meltdown.
Bears scored on a long drive early in the 4th. After a pair of punts Detroit was driving but Stafford was sacked. Patricia elected to try a 55 yard FG rather than punt, and the missed FG gave Chicago the ball in good field position. The Bears score a TD that only took about off the clock, and now the score is 23-20 with just under 3:00 to go.
On 3rd down on the next possession Stafford throws a pick, and Chicago has the ball inside the Detroit 40. A run, a penalty, and then Trubisky throws a TD to give the Bears the lead with just under 2:00 to play.
Lions drive down inside the 20 but can't score on the final two passes. First throw should have been caught.