As Raibert explains, Handle is an "experiment in combining wheels with legs, with a very dynamic system that is balancing itself all the time and has a lot of knowledge of how to throw its weight around." The original video, which has since been edited to blur out the monstrous robot at BD's request, shows Handle navigating smoothly on a level surface before straight-up hurdling over an obstacle at full speed without breaking a sweat -- not that it can sweat, because it's a robot. It even manages to negotiate its way down a grassy hill without much difficulty, which is a testament to the technology at work here.
Oh, and it's called "Handle" because it's eventually supposed to be able to handle objects -- like, say, a laser pistol, or the severed head of its creator. Now would be a good time to learn how to speak robot.