Atlas looks like the prototype for a future robot infantryman, and it can tackle rough terrain and carry human tools. Can you say "Skynet"?
That creepy feeling you get watching things you know are machines moving in life-like manner is called the "uncanny valley", that place where your mind can't quite connect the two disparate images to reality. Can you imagine a terminator robot controlled by a demon, the literal "ghost in the machine"? The appearance of the Antichrist can't be too far away.
Read more at - http://news.cnet.com/8301-17938_105-57593396-1/be-afraid-darpa-unveils-terminator-like-atlas-robot/
And now the creepy, dancing spiderbot that was printed, that's right, printed on a 3-D printer...