One more non-joke answer. Legend goes that when the budding 80s Oilers lost in the Stanley Cup Finals to the Islanders they passed by their locker room. Rather than partying and celebrating the way they'd imagine Cup champs would, the Islanders were almost somber, icing their wounds, and completely exhausted physically.
This taught the Oilers what a true champion looks like (it wasn't what they had in mind), and this greatness was then passed to the Great One and the Oilers as the next NHL dynasty. The Oilers would go on to defeat the Isles in the Stanley Cup Playoffs.
Of course I've heard some former Islanders say that really they were partying and just calmed down when the Oilers were walking past as a sign of respect and sportsmanship. Either way, lesson learned.