A hulking humanoid doing a backflip. And that’s after it leaps from platform to platform, as if such behavior were becoming of a bipedal robot. br br To be clear: Humanoids aren’t supposed to be able to do this. It's extremely difficult to make a bipedal robot that can move effectively, much less kick off a tumbling routine. The beauty of four-legged robots is that they balance easily, both at rest and as they’re moving, but bipeds like Atlas have to balance a bulky upper body on just two legs.