Fire won't stop them. Bullets won't stop them. Now not even a road covered in loose rocks will slow down our demise at the hands of our eventual robot destroyers.
This is Atlas, a humanoid robot from the nightmare factory that is Boston Dynamics. You'll not only notice that it has such amazing balance that it can navigate the rocky road (those cables are for power, not support), but that the thing is also starting to bear an uncanny resemblance to the Securitrons from Fallout.