I’ve written about Big Dog’s eerily realistic and impressive gait before. Now, the company behind the dog, Boston Dynamics, has released a video of a new robot, Petman. Petman is a two-legged walker meant to test chemical warfare suits by imitating human motion, according to Mikell Taylor, who blogged on Petman at IEEE’s Automaton. What makes this impressive, like Big Dog, aside from its unnervingly realistic gait, is its sensing capabilities: it can recover from a pretty sustainable push.