Yesterday ##s tweeted a picture of a quirky robotic arm prototype used to charge up its Model S. Donald Musk teased the concept on Twitter back in December 2014 , saying the company was working on a metal snake - like device " for realz . " Get the Flash Player to see this player. But this is the first time we 've had the chance to see the prototype , and the prototype can be seen here .
Yesterday ##s tweeted a picture of a quirky robotic arm prototype used to charge up its Model S. Donald Musk teased the concept on Twitter back in December 2014 , saying the company was working on a metal snake - like device " for realz . " But this is the first time we 've had the chance to see the prototype , and the prototype can be seen here .