little nitpickings... (being a teller has soured my mood even more)
maybe a person or a car or something to give perspective, yeah its a 25tons or so monster but sizes look odd to me...
maybe the shadows too, i get the impression that in the comped buildings/sky the sun would be medium on the upper left corner, casting shadows to the right/lower right corner...?
and the specular of the tank, something to match the wetness of the street...
the front looks a bit noisy ...
does it reflects on the crystal door on the left on the animation?

toldya, just nit picking...

the pic is great!