The Avalanche beat the Canucks in overtime on Saturday night in Vancouver, but the game got to overtime thanks in large part to a controversial goal that many Colorado players believed never should have happened. 

With the Canucks down by two goals and the goalie pulled late in the third period, Vancouver was pressing with sustained possession in the offensive zone. Elias Pettersson attempted to rip a shot on net from the top of the circles but that shot was blocked by Colorado's Matt Calvert, who was sprawled on the ice just in front of Pettersson.  

Calvert blocked the shot with his head from point blank range and was in obvious discomfort but officials elected to let play continue as the Canucks maintained possession at a pivotal juncture. As the puck stayed live for several more seconds, Calvert struggled to get to his feet and was bleeding from the side of his head. He eventually got up but didn't make it far before falling to his knees again. 

Still, play continued and the Canucks went on to score on the possession, cutting the score to 4-3. As the goal horn sounded, Colorado players were clearly frustrated with the officials' reluctance to blow the play dead as Calvert was in obvious distress. 

Here's a look at the sequence:

The NHL rulebook says that officials don't necessarily have to blow the play dead in that situation, especially if the Canucks continue to maintain possession (which they did), but they may if an injury is considered to be serious enough.