Harrington barely had a chance to take the snap before Green was lunging at him, so in an attempt to avoid the sack he carelessly threw the ball into traffic.
Briggs, who dropped at least one sure interception for a touchdown earlier in the year, took the wounded duck and returned it for his second career touchdown.
While the Bears failed on a two-point conversion, the defense's sixth return for a touchdown on the season gave the team new life. A few minutes later the offense reached the end zone for the first time in 39 possessions.
"At halftime things really weren't looking good for us. We challenged the guys at halftime to come out and to be the team that we could be," Lovie Smith said. "We got the big turnover from Lance Briggs, offense woke up and started moving the ball."
If not for a poor call on a replay challenge the team would have overcome a 16-point deficit and scored two touchdowns in the fourth quarter after going 11 quarters without one.