Remember BigDog, that four-legged robotic mule built by Boston Dynamics? Well friends, now, more than a year later, BigDog’s creators have come up with a two-legged master for the beast, and his name is Petman. Apart from looking like a drunk man when walking, Petman, just like Bigdog, has the ability to keep its balance, even when given a good push from the side. Nothing as impressive as its shorter companion, but what can you expect from something that only has two legs?