Tom Brady showed his old magic, and Kansas City and Denver remained unbeaten on the sixth sunday of the 2013 NFL season. Here's what we learned:

Chiefs Fans Get Very Loud in Kansas City

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The Kansas City Chiefs (6-0) scored 17 unanswered points after halftime to beat Oakland (2-4) by a score of 24-7 at a very loud Arrowhead Stadium. How loud? The Chiefs announced that the crowd noise reached a record-137.5 decibels, which broke the Guinness World Records' mark of 136.6 set by Seahawks fans in Seattle in September. The crowd often reacted to the Chiefs' defense, which had 10 sacks and three second-half interceptions of Raiders' quarterback Terrelle Pryor. It's a huge turnaround in Kansas City, where last year's loudest crowd noise was the booing at what was then the NFL's worst team.

The Government Isn't the Only Thing on Hiatus in Washington

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Though they were NFC East champs last season, the Redskins (1-4) have been a huge disappointment in 2013. A little over nine months since defeating the Cowboys (3-3) to win the division, Washington had its special teams victimized on Sunday night in Dallas. Dwayne Harris had an 86-yard punt return for a touchdown and a 90-yard kickoff return to set up another score in the Cowboys 31-16 win over the Redskins. While Washington quarterback Robert Griffin III showed signs of improvement, running back Alfred Morris was ineffective — save for a 45-yard touchdown run in the third quarter. The Redskins still have a chance to stay in the playoff hunt thanks to their mediocre division, but the time is slipping away.

Texans Fans Are Frustrated and Mean

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Upset with their team's disappointing 2-4 start, Texans' fans cheered after starting quarterback Matt Schaub injured his right leg during Sunday's 38-13 loss to the St. Louis Rams (3-3). Schaub has become the center of fan criticism in 2013, but cheering a player when he's hurt? That's a lot more East Coast than Gulf Coast. Texan teammates Brian Cushing and Andre Johnson publicly criticized fans afterward, which added another ugly layer to the team's issues this season.

Tom Brady Can Still Be Super

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After failing to throw a touchdown pass for the first time in 52 games last week at Cincinnati, Patriots quarterback Tom Brady was on the verge of going a second straight contest without a scoring toss, as New England (5-1) looked like sure losers against New Orleans (5-1). But in front of a half-empty Gillette Stadium, Brady guided the Patriots on a 70-yard, fourth-quarter drive that culminated with a five-yard touchdown pass to Kenbrell Thompkins with five seconds left. For those fans that did stay, New England's 30-27 comeback win showed that the Patriots might be good enough to be Super in February, too.

The Broncos Beat the Jaguars, But Not the Spread

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Denver (6-0) beat Jacksonville (0-6) by a 35-19 count — not the record 28-point margin sports books had set at the beginning of the week. The Jaguars pulled within 21-19 midway through the third quarter before fading. Broncos' quarterback Peyton Manning threw for 295 yards and two touchdowns — three if you count the pass Jags' linebacker Paul Posluszny intercepted and returned 59 yards for a score. Jacksonville still seems like a lock to finish with the worst record in the AFC, but winless NFC teams Tampa Bay and the New York Giants could give them a run for the NFL's overall worst squad.

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