It was senior night in Farmington and goaltender Austin Krause was getting the start after being sat in favour of a sophomore goaltender. Krause was unhappy with his role and had supposedly premeditated this outburst. He took the puck, put it into his own goal, removed his glove, gave his coaching staff a gesture, and left the ice through an already opened gate.
s/t to @FollowThePuck and @RLMarkuson for information.