I could just imagine this going down a street, and just annihilating the absolute shit out of everything. There would be cars on fire, people running away screaming, buildings in ruins... yeah my imagination's kind of messed up.
But anyway, this is an absolutely fantastic work. You have drawn quite possibly one of the most badass mecha I have ever seen.
Fantastic image and nice design. The only thing I would change if it were my image, would be to bring the legs slightly closer together. Just a personal aesthetic thing though. It's a great design whatever the case.