Just came across this at Machine Thinking:

At first, I thought this was two guys in something akin to one of those two-person horse costumes, but then as the video kept playing, I eventually had to accept that this in fact is a machine. Be sure to continue watching until a guy kicks the robot really hard in the side – the way that it regains it’s balance is incredible. Then, when they show it trudging through deep snow, it just appears to be struggling so much, I almost started feeling bad for the thing – won’t be too long now before somebody starts PETR – People for the Ethical Treatment of Robots :)