Wow.
I've always been a fan of amatuer 3-D artwork and animation, and this is no exception. This intricately detailed mech must be composed of hundreds of polygons! While it's flat shaded (thanks to the limitations of 3-D Flash), it's well illuminated and doesn't appear to have any leaks. The only problem is that Flash apparently has crappy translation from 3-D to vectors, or whatever process it undergoes to create such animation, because there is a little bit of clipping and many of the polygons keep "blinking". Overall, though, a very good effort. This has some real potential.