>Imagine coming face to face with this monster in the woods!
>
>http://www.bostondynamics.com/content/sec.php?section=BigDog
>
>Quite the robot... :o)

Yep, the best one so far. I've seen this before, maybe this winter or thereabouts, and still haven't seen anything performing better. These guys seem to have understood the dynamic of the bipedal motion, then applied it to two opposing pairs of legs - like two drunk guys holding to the same crate of beer and somehow failing to fall. Ingenious.