After Sunday's game came to an end, 49ers head coach Jim Harbaugh celebrated by jumping around. He continued this celebration right up until he shook Lions head coach Jim Schwartz's hand, and Schwartz didn't take too kindly to it.
Schwartz decided to chase Harbaugh down and even bumped him a little bit. Schwartz and Harbaugh were then restrained, although Schwartz managed to break free and again chased Harbaugh down as he ran toward the tunnel. The referees and players and personnel from each of the teams eventually got in between the two head coaches and some shoving ensued before the two teams were separated and sent to their locker rooms.
Per Albert Breer, Harbaugh said after the game that he was too revved up and shook Schwartz's hand "too hard." According to Mike Florio, Schwartz said he went out to midfield to congratulate Harbaugh and "got shoved out of the way." He also said, "I didn’t expect an obscenity at that point."
My take on the "incident" is this: Harbaugh probably shouldn't have celebrated like he won the Super Bowl, especially right as Schwartz was walking toward him to shake his hand. In the NFL's eyes, Schwartz probably shouldn't have chased Harbaugh down, but I think we can all understand why he did. The NFL might have an issue with the incident, but Schwartz stood up for himself and his team, and I don't think any Lions fans or players will complain about that.