When your favourite team is down and out during a game, you have paid for expensive tickets and high-priced beer and food most of the time you would stick around to see the end of the game or hope that your team would have an unforgettable comeback.
It's not normal for Canadian NHL fans as most would stay till the end of the game no matter what the score is. Sometimes there are exceptions to the rule, whether it's poor weather conditions or a Monday or Tuesday night game in which they have to work the next day.