If Lambeau Field is one of the most intimidating home-field advantages in the NFC, then Arrowhead Stadium is its equal in the AFC.
Even though this game was expected to be a walk in the park for the Green Bay Packers, AFC rivals will tell you that a win at Arrowhead is always hard to come by in December. The wind swirls, the crowds rock and the records (today especially) must be thrown out the window.
Green Bay came in missing a huge link with Greg Jennings nursing a knee injury and, in turn, that makes the Packers offense a little easier to cover in the passing game.
One of the strengths of the Packers aerial attack is the fact that they force defenses to make decisions in who will run free, and Aaron Rodgers almost always finds them.
Perhaps more important from an injury perspective is along the offensive line for the Packers. Losing Bryan Bulaga and Derek Sherrod in the game allowed for Tamba Hali to declare open season on Aaron Rodgers and harass the star quarterback for three sacks in the game.
Couple that constant pressure with uncharacteristic inaccuracy from Rodgers and it was a recipe for disaster for the Packers usually effective offense.
Another unexpected factor working against the Packers was a new coach and new quarterback taking over for the Chiefs this week. Inevitably, there is going to be an emotional boost given to a team that feels like they may be making a fresh start—however late it comes in a season.
Kyle Orton was able to inspire the flaccid Kansas City offense just enough to outscore the Packers and take advantage of the fact that the Packers defense is vulnerable in terms of yielding some big passing plays.
Romeo Crennel had an entire season to make a list of "things I would do differently" while watching Todd Haley slowly fade away as the head coach of the Chiefs.
It is unlikely that Green Bay will face another game situation like the one they did today, but each game brings its own list of hurdles that must be cleared.
Green Bay did a great job of clearing those last season down the stretch and into the playoffs, so there is no reason to believe that they cannot do it again this season.