Cool idea for a thread, most of us olderish guys will remember the ol' mini-rigs.
The MTV-7. That thing was crazy, like a steam roller with a front mounted gun and the ability to bob up and down. I had one as a kid, but I never really knew what to do with it... it is that whole bobing thing, it just didn't make any sense! And I loved the thing for it. The MLC-3 was pretty cool too, I loved the bubble canopy.