During a BBC documentary called “How to Build a Bionic Man”, a journalist visiting Professor Hugh Herr at MIT University. The Herr invented terminator ankles that behave very realistically and understand the movement of the user's foot. Adapt to different situations, as the slow and the fast walking, or climbing on ladders. The journalist will be surprised when the Professor reveals that time himself these Bionic legs beneath his pants, something that until that moment had not realized.