This thing is unreal. I think the video explains more than I can say.  The whiny noise is a little annoying, but the way it moves is freaky! They call it Big dog, measuring 1 metre long, 0.7 metres tall and weight of 75 kg (but amazingly can carry twice that). Perhaps they were basing it on a Irish wolfhound which seems to have similar dimensions.

It’s made by boston dynamics and like most super advanced robots it has mainly military applications. Imagine a pack of these with stereo vison and an automated machine gun turret chasing you though a forest. Enough to make your pants into a cottage pie making factory pretty quick I’d say.