Wayne Gretzky highsticks Doug Gilmour in the face (draws blood!), in overtime of the Game 6 Stanley Cup semi-finals and referee Kerry Fraser doesn't call the penalty. At the time if a player highsticked another player in the face and drew blood it was an automatic 5 minute penalty and a game misconduct. As the game's highest profile player and with a league mandate to build the NHL profile in the US, Fraser refuses to call a penalty on Gretzky, even after conferring with his linesmen, and shortly after not calling the penalty and kicking Gretzky out the game, of course, Gretzky scores in OT to win the game for LA and deny the Leafs a chance to play Montreal in the Stanley Cup finals.
The 1993 Stanley Cup finals were the only time I've ever cheered for the Montreal Canadiens.