After losing his left arm to cancer in 2008, Jonny Matheny's life changed radically. The self-styled West Virginia hillbilly, formerly a retail bread sales and delivery man, started travelling to medical research facilities around the country to volunteer as a test-subject for advanced prosthetics and experimental surgeries. Today, Matheny is something of a Model T for cyborgs, wielding one of the most advanced mind-controlled prosthetics ever built.