he climbs 103 stairs using his thought-controlled bionic leg
November, the 4th 2012, a man who lost his leg in a motorcycle accident has made history by using a thought-controlled bionic leg to reach the top of one of the world's
tallest skyscrapers. By simply thinking 'climb stairs' - Zac Vawter, made his way up 103 flights of stairs to the top of Willis Tower (442 meters) in Chicago on the revolutionary prosthetic leg.
The robotic leg responds to electrical impulses from muscles in his hamstring, with his thoughts triggering motors, belts and chains to synchronize the movements of the prosthetic ankle and knee.