Video: Horrible Scene as Oilers' Kassian Knocked Out Cold During Fight

In what was a brutal outcome to watch, Edmonton Oilers forward Zack Kassian was knocked out cold during his fight with Vancouver Canucks forward Zack MacEwen.

The battle of the Zack's was just supposed to get their team's fired up during the preseason tilt between the Oilers and Canucks and unfortunately the scene turned sour.

You can see the concern on the face of MacEwen as the spirited fight came to an end with a take down, and good on the linesmen for noticing right away and calling for medical attention.

Warning, this isn't for everyone: