Adam Carriker and the Huskers are one of only two teams to have allowed just one touchdown. The other? Virginia Tech. Brian Bahr/Getty Images
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SI.com's Cory McCartney takes a weekly look around the college football nation, with inside reports from each of the six BCS conferences and beyond.

Big 12

Nebraska and Oklahoma are falling so hard, so fast, they'll soon be in need of a Troy McClure-esque introduction.

Hi, I'm Oklahoma! You might remember me from such games as the 2004 Orange Bowl or the '03 Sugar Bowl.

There's a red-and-white void in the AP poll of historic proportions. For the first time since Nov. 3, 1969, the poll does not include the Cornhuskers or Sooners.

To quote the illustrious Peter Venkman, in Lincoln and Norman it's "Human sacrifice, dogs and cats living together -- mass hysteria."

Oklahoma's slide is astounding for a team that played in the last two title games. But with the departure of Jason White, and an offensive line whose best blocker, Chris Chester, is a converted tight end, the Sooners (1-2) were destined to have issues.

The Cornhuskers are 3-0 with unimpressive wins over Maine, Wake Forest and Pittsburgh, and they're probably the nation's biggest oddity. Nebraska's offense is 106th in the nation, averaging 271.3 yards per game, the first time since '68 the Huskers have averaged less than 300 yards. But it has the No. 1 scoring defense in the country (5.3 points per game), leads the nation in sacks (20) and has allowed just one touchdown. Offensive guru Bill Callahan's team is surviving on its defense? That's like MTV forgetting to put a hot tub in The Real World house.

After beating Pitt 7-6, Callahan's feelings on his O's ineptitude could be wrapped up in this postgame exchange with ABC's Jack Arute.

ARUTE: "Let's talk about your offense, coach."

CALLAHAN: "Let's not."

SEC

Is Steve Spurrier a little bitter about the worst home defeat of his 16-year career? Spurrier is shaking up a defense that allowed 489 yards, including 338 on the ground, in last Saturday's 37-14 loss to Alabama. Freshman wideout Carlos Thomas is switching to cornerback, where he'll start opposite Tremaine Tyler, replacing Fred Bennett and Johnathan Joseph. Spurrier is staying mum on the rest of the moves, but co-defensive coordinator Tyrone Nix says sophomore Jordin Lindsey and senior Charles Silas could start at the defensive end spots. They would replace the duo of Josh Johnson and De'Adrian Coley, who have combined for zero sacks ... Florida coach Urban Meyer is displeased with the Gators' offense, saying they basically had two good drives against Tennessee: an 80-yarder in the first quarter that ended in Andre Caldwell's 18-yard TD and a 63-yarder in the fourth, culminating in Chris Hetland's 20-yard field goal. Everything else was because special teams gave them great field position.

ACC

Devin Hester's improv skills won't be landing him a spot on Best Week Ever. Trapped in the backfield by Clemson defenders after taking a pitch from quarterback Kyle Wright, Hester fired a 33-yard pass to fullback Quadtrine Hill. Just one problem: Miami was penalized for an ineligible receiver downfield. Hester, unaware of the rule, came off the field, expecting to receive Larry Coker's praise. "I said, 'No, Devin, that's not good'," Coker told the Palm Beach Post. "We just have to coach him better on the rules" ... Yes, it was against two teams with such punch you'd think they were running the Mahatma Gandhi offense, but Virginia Tech's defense has pitched back-to-back shutouts. The Hokies blanked Duke and Ohio, and haven't allowed a touchdown since N.C. State's first drive in the season opener. "It's a beautiful thing going on right now," Cornerback Jimmy Williams told the Roanoke Times. "It's just like it's fresh meat out there on the line and everybody on defense wants to make a play, and just wants to make an impact."