Built by Boston Dynamics, the BigDog robot is a four legged robotic mule which can carry up to 340 pounds on its back over almost any terrain. As you’ll see in the following video, this DARPA-funded device can withstand a good kick on the side and walk over ice while keeping its balance. Before hitting the play button, you might want to lower your speaker’s volume a bit; the robot’s engine could be qualified as… noisy, if not to say downright annoying.