www.snopes.com says... maybe.
I can't find the first pictures of the guy running around the cars, but the last image, the one of the injuries, is linked there to a polar bear attack on a campsite in the Yukon. The last image may not be directly related to the first images.
Warning - there are some images on Snopes.com, should you search for "polar bear", which people may find distressing - strong stomach required.
I won't post a link to the page as people can click on those accidentally or without thinking.
Cheers,