This is a truly amazing video Words can’t do it justice, so watch for yourselves and marvel at the ways in which Mother Nature can surprise us. http://www.viralviralvideos.com/2014/...
This reminds me of a video I saw a year or so ago of a polar bear who had made friends with a team of huskies in Canada, and every year returned to catch up and play with them. Professional opinions on that case were that the solitary bear had a need for play and enrichment that it wasn't getting elsewhere, so when the huskies treated it as a playmate it responded appropriately instead of seeing them as a threat or food.
https://www.youtube.com/watch?v=5bcl0...