Here are four things we learned in Sunday night's 28-20 comeback win over the 49ers:*
1) The kid can play. Subbing for the injured Kyle Fuller, rookie cornerback Kyle Fuller fueled the Bears' rally with not one but two fourth-quarter interceptions of Colin Kaepernick. Both picks led to touchdowns as the Bears outscored the 49ers 21-0 in the final period.
The Bears chose Fuller with the 14th pick in the draft. At the time, general manager Phil Emery revealed that he knew he wanted to take the Virginia Tech product after seeing how willing he was to crash through the center-guard gaps to disrupt running plays last year versus Georgia Tech.
Fuller showed the same fearlessness Sunday night against the 49ers and will be counted on even more now that Tillman has been lost for the season with a torn right triceps.
2) The Bears possess the heart of a champion. With some outsiders already beginning to write their season eulogy, the Bears overcame deficits of 17-0 and 20-7 to stun the 49ers. The improbable victory snapped an eight-game road losing streak to San Francisco during which the Bears had been outscored by an average margin of 34-6.
After their first six possessions of the game resulted in punts, the Bears scored touchdowns on four straight drives to record their biggest comeback win since erasing a 20-point deficit in a 24-23 Monday night victory over the Cardinals in Arizona on Oct. 16, 2006.
"As you go on this marathon of a football season," said coach Marc Trestman, "you're going to have opportunities to gain some backbone and I think this really helped us and will help us."
3) The Bears defense looked like the Bears defense again. After yielding 193 yards rushing and generating little pressure on the quarterback in a season-opening loss to the Bills, the Bears defense regained its roar against the 49ers, generating four takeaways and four sacks.
The defense actually played well in the first half, with the 49ers' two touchdowns coming on drives that began at the Chicago 8 and 30. The defense was even better in the final two quarters, holding the high-powered 49ers to just three points.
Defensive end Willie Young recorded two sacks on San Francisco's last drive, increasing his season total to three, matching his career high he recorded last year with the Lions. Fellow defensive end Jared Allen also made an impact, creating a takeaway by forcing a Kaepernick fumble.
4) The special teams still need work. The Bears put themselves in an early hole when Pat O'Donnell's punt was blocked on the game's opening possession, rolling out of bounds at the Chicago 8. Three plays later, Kaepernick's 3-yard TD pass to Michael Crabtree gave the 49ers a 7-0 lead.
The Bears also committed six penalties on special teams, including three on one punt. It didn't help that top special teams player Sherrick McManis was forced to exit early with a quad injury.