5. The Life and Times of Grizzly Adams (1974)
While the Grizzly Adams television series was hokey, the original film was somewhat rooted in reality. Based on California mountain man James Adams (1812-1860), the movie tells the story of a man who saves an orphaned grizzly cub, leading to the two becoming lifelong friends. According to Ciarniello, this isn't as far-fetched as it might seem. "Bears are solitary, lone animals, but for the first part of its life that bear could certainly bond with a human and follow him around. Charlie Russell's work is actually the best proof of that — he found two orphaned bear cubs and became basically their mother, and taught them how to fish and they followed him around. The bears later dispersed, but they did come back to see him."