Next time you thought you need someone to lend a helping hand, think of this Third Arm. The whole idea seems supernatural but for Stelarc, it was more of a tangible concept. He is the same Australian performance artist who hung himself naked from flesh-piercing hooks attached to ropes. Well, this superficial arm will couple with your right arm and is shrewdly capable of independent motion. It is triggered into action by the EMG signals of the abdominal and leg muscles.