It runs at 4 mph, climbs slopes up to 35 degrees, walks across rubble, carries a 340 lb load and looks like a mean dog. Introducing the BigDog, a quadruped robot developed by Boston Dynamics and funded by the US Defense Advanced Research Project Agency (DARPA). Watch the video of it in action. I'm impressed but I think they need to do something about the noise. Don't want your enemies to hear that you have a robotic dog walking your way aye.
Videos of military bots in action at the Singapore Tech X Challenge
Singapore's Military Robot Contest