The NHL Stanley Cup Playoffs are very well known for their increase in emotions, intensity and physicality. When you mix these three factors with a good old Canadian rivalry, it can sometimes lead to plays crossing the line.
In the Canucks versus Oilers' very first period of play, the Oilers' forward Zach Hyman delivered a very questionable hit on the Canucks' captain Quinn Hughes. He came into the captain's dead angle and assaulted him in the back.