The hit by Jared Cowen on Jeff Skinner is illegal hit on two fronts. First Cowen left his feet to make the hit and should result in a charging penalty.

Secondly, through this "elevation" by the 6'5" Cowen, the head o fJeff Skinner, generously listed at 5'11," became the principle point of contact. Given the size differential, combined with the upward launch when Cowen's skates left the ice, it would be next to impossible for Skinner's head not to become the principle point of contact. Jeff Skinner became another concussion statistic for a bad hitting style that must be eliminated.
It is no longer acceptable for any of us to justify hits of this type as being 'good hockey hits' when the head becomes the principle point of contact. The NFL will most likely agree!

-Kerry Fraser of TSN, where you can read more on the hit.

If you need to see the hit again or missed it earlier, you can watch it here.