Add in that these two teams played each other earlier this calendar year for a spot in the Super Bowl, and there was no doubt emotions would run high. And wouldn't you know it - that bad blood filtered right on down to each team's fans:
Well, at least this one took place between fans of different teams. Not only that, this one carried on even after it looked like it was initially broken up - that's how dedicated these fanbases were to going at it. Unlike the game, though, the fighting ended without a clear winner. The players in 49ers jerseys could only wish they'd made out as well as the fans wearing them above.