An unpleasant incident occurred during the Bruins vs. Panthers game for NHL referee Steve Kozari.

NHL referee Steve Kozari made a few expletives escape into a hot mic by accident.

Don't you f****** test me, Steve Kozari could be heard yelling over the microphone.

The event generated a lot of discussion on social media, with both supporters and critics chiming in on Steve Kozari's use of language.

Despite the controversy, the game continued, and the Panthers scored on the ensuing power play by taking advantage of matching penaltie

The incident still serves as a reminder of the need of professionalism and civility in the NHL and sheds light on the difficulties referees have in keeping control of crucial playoff games.