I've seen that same event played out a few times in Arrowhead's parking lot. Thankfully, I've never been involved with any of them. However...
Several years ago, I drove to KC with some co-workers who were Broncos fans and I was the lone Chiefs fan. A couple of my co-workers were trying to flip shit on the way back to the car and I stood there watching as they got their ass handed to them by Chief's fans. And then I had to ride back to Denver with them. The older brother of one of them was pissed at his brother for his stupid behavior and I had a difficult time trying to contain my laughter. The dude was an idiot and a sore loser. (We crushed the Broncos then.) Damn, that was a long ass ride back to Denver listening to their bitch-fest.