There's an adage in sports that goes something like this: You must seize your opportunities when you get them because you won't get many. If this is true, it's especially true in the NHL playoffs. In a run for the Stanley Cup, you play against good teams, and good teams don't make many mistakes. When they do, you need to pounce. And at no time is this more crucial than when a team is blessed with a five-on-three power play.
To put this importance in context, we need to take a look at the concept of the turning point. Turning points are tied to opportunities when the score is close. If you take advantage of an opportunity and score a goal, that likely will be the turning point in the game.