Not today, Mr. Mexico.  Not today.You knew it was a big game because of how long the day seemed to take on Sunday. Given the Bears lack of success in recent years, they don’t do prime time a lot, and it can really screw up your couch time on Sunday when you have to wait until three hours after sunset to finally get your fix.

The scene was familiar. It was cold. Soldier Field was full. The defense was hassling another famous quarterback. The offense was making those beeping noises you hear when the snowplow is shifted into reverse.

The Lovie Smith Bears know how to win games like this. They aren’t pretty, and often times they’re frustrating to watch. It’s the rare team whose defense gets the fans more excited about the possiblility of a touchdown than the offense.

So, at the half, the Bears had a 6-3 lead, thanks mostly to the defense clobbering anybody in a Falcons jersey and two big offensive “plays.” A reverse to Bernard Berrian and a pass interference call on D’Angelo Hall. Whoo! Everybody was fired up.

Then Suzy Kolber stopped Lovie on his way to the locker room for the perfunctory chat. The Bears were ahead, somehow, when their quarterback was 2-10 for 12 yards. The backup quarterback had spent most of the first quarter playing catch and looking wistfully at the field.

Did Suzy ask Lovie about the quarterback? Of course she did. She asked him about the other team’s quarterback. Lovie had a look on his face as he gave his coachspeak answer about shutting down Michael Vick, a look that made me wonder if he had something he really wanted to say.

Turns out, he did.

Had Suzy asked the Bears’ coach about the Bears’ players, she’d have actually served a useful purpose on the sidelines. She’d have broken the news that after 26 games in the deep freeze, Rex Grossman was about to be…well, thrown into a new deep freeze.

ESPN found out sometime during halftime because when it was time for the Bears’ offense to take the field, they found Grossman on the sidelines and gave the tease that Bears’ fans have longed to hear. Rex was coming in. There he was, helmet on, body parts in tact and ready to roll.

They came back from commercial and showed his jog to the huddle. We all looked for a sign of a limp, after all he’s had his knee and ankle sewn back together since his last regular season appearance. To me he looked a little wobbly. Turns out it wasn’t a limp.

It was a swagger.

First play: With the Falcons and the world figuring hand-off, Grossman faked to Thomas Jones, waited behind impossibly good blocking and fired a strike to Muhsin Muhammad for 22 yards and a first down. For the first time since…God knows when…the middle of the field was open for business.

Grossman found Justin Gage on a hot read slant for a first down, one of those Bears’ third down conversions that normally coincides with white smoke over the Vatican.

You could feel the energy in the old-new relic by the lake. 57,000 fans had braved the cold and the wind to see the Beloved, mainly to watch through spread fingers with hope that their feeble offense wouldn’t completely waste a once-in-a-generation defense. Suddenly, there was a realization.

“Damn, this guy can sling it!”

In one move the Bears offense was suddenly more aggressive, more diversified and most importantly, more legitimate.

Out went a linebacker and in came a nickelback and suddenly, 14 weeks into the season, the Bears were facing a seven man front. Grossman’s passes just looked “different.” They were thrown harder, more on a line and with more precision, but it was more than that. They were thrown with a purpose.

The Bears had gotten to 10-3 with a backup rookie leading the way. At times, Kyle Orton looked like, well–a backup rookie, other times he was much better than that. He did his job. He made just enough plays, he almost always avoided the huge screwup and the Bears won, and won, and won, and won and won, and won, and won. Eight in a row. Orton showed enough to give us all hope that there’s a really good quarterback in there. Someday. Down the line. But there’s a reason rookie quarterbacks don’t come in and cozy right up to the job.

Even if we didn’t want to admit it, the games since Orton’s excellent performance against Carolina had convinced us all that the future was not now for these Bears. Defensively, on special teams and in the running game they were championship caliber. But bad luck (injury wise) and inexperience had left the passing game with far too few bullets to carry them in the playoffs. The Bears seemed destined to have a good regular season, followed by a playoff flameout and hope that the offense could retool in the offseason and next year could be the time to take advantage of a ridiculously good defense.

Admit it, you kept tabs on the Vikings game yesterday hoping for a Minnesota loss to lessen the possibility that the Bears might tank the last three and end up on the wrong side of the playoff picture.

But one series (actually, it was technically two, given the Falcons interception-goalline fumble) into the second half and the outlook had changed.

The Bears’ defense, the single most feared unit in the NFL, had a companion. The 57,000 freezing their keister’s off and the hundreds of thousands more at home perched on the edge of their recliners with their hands up over their heads were screaming for a reason. If Rex is ready to hold up his end of the bargain on offense, there’s no telling how far these Bears can go.

(Actually, they could probably go to the Super Bowl and then get whacked by an AFC team, but you know what I mean.)

Suddenly, surviving the end of the year with an NFC North title and some playoff dignity in tact was replaced by a feeling that there’s no need to wait anymore.

Win the last two games. Make the Giants come to Chicago in January and then head out to Seattle for an NFC title game showdown with the Seahawks and their manatee head coach.

Sure it’s all absurd. How can a team switch quarterbacks to an injury prone dwarf who’s only made six NFL starts and really believe they’re good enough to do anything special?

Well, the Bears don’t need Rex Grossman to throw for 300 yards and five touchdowns to win a game. What they need is a quarterback who can squeeze 24 points out of an offense from time to time.

Because the reason the Bears have a shot is still on the other side of the ball.

The defense was embarrassed by their performance in Pissburgh last week. Brian Urlacher and Lance Briggs never miss tackles and they spent three hours doing just that in the snow.

To say they arrived at Soldier Field last night with a chip on their shoulder is an understatement.

It took all of four plays to see things would be different on this night. One play after he’d turned on his jets and scooted past Urlacher for a first down run, Michael Vick found himself slipping out of the pocket again. He made a great move and was ready to scoot around a block and head back up the sidelines for another big gainer.

Only one problem. Where Urlacher had taken the wrong angle on the previous play, he wasn’t about to do it again. He slipped under the blocker and hammered Vick to the frozen turf. A replay showed the look on Vick’s face as he threw the ball at Urlacher in frustration. It was a look of “Where did he come from?” Vick would flash that same look several more times before his night was over.

In the second half, the three headed idiot that is the ESPN Sunday Night crew went on a long discussion about who the MVP of the NFL has been in 2005. They talked about Peyton Manning and LaDanian Tomlinson and Tiki Barber and a bunch of other guys. While they were talking, the camera never left Brian Urlacher. It was like the director was casting a silent vote right along with them.

The Bears defense is great because it has so many guys who can make so many plays. From Briggs to Nate Vasher to Walleye to Alex Brown to Tommie Harris and on and on and on. But even while surrounded by playmakers, one guy stands out every week.

A year ago he was hearing absurd talk that he’s overrated, this year, you don’t hear that. Truth is, the Falcons never had a chance against the Bears because the Bears have an answer for the guy nobody has an answer for. Everywhere Vick went, Brian went there, too. What a luxury it is to face a freakishly gifted quarterback and be able to assign one guy to stop him. Several times, ESPN used their underrated SkyCam to show Vick lined up either in shotgun or under center and there just off his left was big Brian. Everywhere he went, there was Brian.

Urlacher spent so much time on Vick that he’s probably got herpes today.

The Bears didn’t just stop Vick, they rendered him useless. He looked like a faster Jonathan Quinn. Vick’s not the most accurate passer around on his best day, and this was not his best day.

He looked colder every time you saw him. Colder, sorer and more frustrated.

When it wasn’t Urlacher it was part of Paul Maguire’s famed “Bermuda Triangle” of Walleye Ogunleye and Alex Brown (wait, don’t you need three of something to have a triangle?) who were chasing Vick around. Brown got to Vick in the first quarter and sat on him for a second, just long enough for Vick to get the impression that the only warmth he was going to get was going to come from some violent Bear hugs.

The most telling subtle moments of last night’s game had to do with the reaction to Rex Grossman. While the crowd went nuts at his entrance, that’s not what I mean. First, you saw the excitement in the huddle when he bounced in. It’s hard to overstate just how much his teammates wanted him back. All the way back to mini-camps in March, their hopes had been pinned to him. Then he got hurt, again, and they had to go on without him. But you could tell in recent weeks that they were getting impatient waiting for him to get back into the fray.

Is it a coincidence that Orton’s play began to suffer the week that Grossman first suited up? Or that Moose’s patience with Orton disappeared just about the same time Rex switched from the walking cast to the high top Reeboks?

So when Lovie made the call and sent Rex in, he not only fired up the crowd, but his entire team. In the postgame interviews every question asked a defensive player about the offense drew a huge grin.

As good as the defense is, they weren’t going anywhere with a lousy offense. This gives them a chance. And all they ever wanted was a chance.