Check out this amazing video making the rounds on the internet. This is a video of a three-legged mama bear walking upright with her cub.
No one seems to know how the bear lost her right paw and foreleg (my guess is it's likely the bear was caught in a trap at some point), or where the video was taken.
I've been wrong before, but the video looks to be legitimate:
HikingintheSmokys.com Detailed information on trails in the Smoky Mountains; includes trail descriptions, key features, pictures, video, maps, elevation profiles, news, and more.