It's a velociraptor... on rollerblades.
Much less terrifying than the Mule, since its movements have far less of the jerky horror of that foul beast. However, it's still a bit creepy. Other than that, this is an incredible display of robotics, I'm very impressed!
The movements still have a bit of the unnaural characteristics from the Mule. I probably wouldn't have noticed it if I hadn't seen the Mule before, though. For the record, I'm talking about this (which it turns out is actually called BigDog):
Absolutely. Those legs look like something out of an 80s horror movie, with the jerky movements of a stop-motion special effect. Honestly, I don't think I've ever seen anything deeper into the uncanny valley than that unholy abomination. The first time I saw it, I started imagining it walking towards me and accidentally ripping off one of my limbs or something. I am however still impressed by the technology.
Interesting. Are you sure it's the Uncanny Valley and not your preconception of an Evil Robot Out There to Murder You?
Who knows, really, but I don't walk around with fantasies of murderous robots, so I'm siding with the Uncanny Valley theory.