Here is another video, but this is why elkhounds are so awesome. If you consider they've been around since the time of the Vikings - elkie remains have been found in viking burial sites - that alone is pretty impressive.
And I was worried about our two taking on raccoons. Ha!
The head whip is a common trait. If you've ever had the opportunity to play tug with an elkie, and they employ the head whip, you will loose.