PETMAN is a humanoid military robot designed by the company that created Big Dog. The robot, according to the YouTube caption, is intended "for testing special clothing used by the US Army." Spencer Ackerman has more:
Boston Dynamics sells it as a way to "simulate how a soldier stresses protective clothing under realistic conditions," including wearing heavy chemical weapons gear. Lest anyone think the Terminator comparison is far-fetched, the company assures that PETMAN’s ersatz "human physiology" means it will be "sweating when necessary." A headless robot that sweats.