Andrei Nazarov used to be an NHL player, but is now the coach of Vityaz in the KHL. His team lost 3-2 to Dinamo Minsk, but that was not the story of this one. A fan threw something from the stands at Nazarov behind the bench in the closing seconds of the game and Nazarov decided he was going to take action. Nazarov grabbed a stick and started swinging it over the glass at the fan.
H/T to Puck Daddy for the video: