In the third period of a fairly tame match, Pittsburgh forward Chris Kunitz wound up for an empty-net shot after the whistle had gone.
The 35-year-old violated one of hockey's unwritten rules with the play. Bad move.
The Flyers responded just the way one would expect, as every player on the ice rushed Kunitz and a moment of chaos ensued.
The only players penalized on the scrum were Philadelphia's top forwards Claude Giroux and Jakub Voracek. The captain sat for a minor roughing charge, while Voracek received a 10-minute misconduct.
The Flyers ultimately had the last laugh with a 4-1 victory to sweep their season series.