"There is an elegance to it, and that is actually one of the most important things for the users of prosthetics," said McLoughlin. "The natural movement is almost more important than the appearance."
Indeed for Matheney, the bionic arm feels just as natural as the arm he lost -- to the point where "every time I have to turn it back in, it's like losing part of me all over again."
"I do a lot of handy work around the house, a lot of cooking," he says. "And to be able to hold bowls and grab spoons is absolutely amazing."