Autonomous Solutions' robot Chaos can traverse just about any kinds of terrain thanks to its unique "tracks" (that flail crazily when it goes about its business!). Hit play or go to Link [YouTube] - via SlashGear
It kind of looked like it was swimming on the land doing the breast stroke.
Also, I'm no physics major, but it seemed that in the part where the bot was moving the car the people standing on it helped move it forward by pushing their weight forward.
I'm always a little weary of product movies that are shown in multiple clips sewn together. They could easily stop the camera every time the creaturebotthingi gets stuck, or just cut those parts out. Its still pretty odd/neat though.
Also, I'm no physics major, but it seemed that in the part where the bot was moving the car the people standing on it helped move it forward by pushing their weight forward.
only, how does he do in water?..