There may well be heavier combined sets of wild animals who are friends with other wild animals, but this enormous brown bear (stay tuned to the end to see his claws) and its also-large man friend could well have achieved the biggest single massage on the planet, since it's hard to give an elephant a backrub. Originally, this article contained a video from a Russian channel (despite the person holding the camera can be heard saying "look how big that bear is" and "oh my god" in English), but a reader correctly pointed out that this comes from the Orphaned Wildlife Center in upstate New York. The 1500-pound bear's name is Jimbo, and the human Jim. One thing is for certain, though: as gently as this behemoth licks and nuzzles his buddy, Jim probably won't want Jimbo to turn around and return the rubbing.

Sources: Orphaned Wildlife Center