The wizards at WETA made this for Neill Blomkamp’s upcoming series of Halo Shorts. From Bungie:

I don’t mean that they made a big plastic thing that looks like a Warthog. I mean they built a fully-functioning, four-wheel steering, powerful, off-road vehicle with a machine gun on the back. At the correct scale. If you live near Wellington, New Zealand, you might even see some crazy machine-shop dude from WETA fishtailing around your base, ahem, I mean neighborhood.

I can see someone showing up at the prom in this sooner or later.