This DARPA video shows versions of DARPA and Boston Dynamics robots climbing stairs, walking on a treadmill and doing pushups.

“A modified platform resembling these robots is expected to be used as government-funded equipment (GFE) for performers in Tracks B and C of the DARPA Robotics Challenge (http://www.darpa.mil/NewsEvents/Releases/2012/04/10.aspx),” according to a DARPA statement accompanying the video. “The GFE Platform is expected to have two arms, two legs, a torso and a head, and will be physically capable of performing all of the tasks required for the disaster response scenarios scheduled in the challenge. However, despite the appearance of the robots in the video, the challenge is decidedly not exclusive to humanoid robot solutions. Any designs are welcome provided they are compatible with shared human-robot environments, compatible with human tools, and compatible with human operators so that a human without expertise in robotics can give commands and confidently anticipate the response.”