When many people consider prosthetic limbs, they often seem to think of mechanisms that replace some of the functions of the original but don't seem to add anything new. Prosthetics limbs are not very common and they're almost always very expensive. To the best of my knowledge I don't know of anybody modifying a prosthetic in any substantial way (or any way, for that matter). That's what made this news article jump out at me: A student at the Atlanta Institute of Music and Media named Jason Barnes lost his right arm in an accident in the workplace. He wears …