Polar bears and dogs playing

I found this video to be pretty impressive how the sled dogs and polar bear seems to be getting along, especially considering that a polar bear could eat one of the dogs if it wanted to. Here in Washington, we don't get Polar Bears, but we do get black bears (possibly grizzly bears in some areas, especially in the Cascades), cougars, possibly wolves (especially in eastern, Washington) and coyotes (you do see them sometimes, especially in the summer), and they can pose a threat to dogs, especially small ones.