February 22nd, 2007 is a date that goes down in Buffalo Sabres history, for better or worse. On that day, the Sabres and the Ottawa Senators put the icing on their cake of mutual divisional hatred with a line brawl for the ages.
To set the stage, the Sabres had just eliminated the Sens 4-1 the previous year in the playoffs, with Jason Pominville capping that series with this spectacular shortie.
So Ottawa already didn't like Buffalo much, and the two teams were again neck-and-neck the following season.