Meet Rezero, the dancing ballbot

Onstage at TEDGlobal, Péter Fankhauser demonstrates Rezero, a robot that balances on a ball. Designed and built by a group of engineering students, Rezero is the first ballbot made to move quickly and gracefully -- and even dance.

Péter Fankhauser says of Rezero: "He wants to demonstrate what he can do, as if he was saying, ‘Backwards, forwards. I can do it all. Look at me!'"