I didn't read any of the articles or look at the video until a friend told me to. I just assumed that it was a result of a pile up, or that Johnson had already been knocked on the ice. However, this was a result of a cheap shot from the defender who threw a deliberate high kick into Johnson. Granted, I'm sure that he wasn't aiming at the neck, but is was clearly an intentional high kick. Don't know the legal details with the assumed risk in a contact sport, but I wouldn't be surprised to see the other player charged with some sort of involuntary manslaughter or assault charges.