For being the world’s largest and most profitable automaker, Toyota rarely flexes its creative muscles. This week, at an event to herald its upcoming North American headquarters in Texas, it let loose, briefly, with this — the wildest Sienna minivan ever to emerge from the factory.

Built on the chassis of the Toyota Tacoma, the Toyota Ultimate Utility Vehicle (TUUV) is … well, a Sienna mated to a Tacoma, part of a promotional cross-country drive. Aside from that, Toyota said nothing else, saying it was saving the rest of the details for the SEMA auto parts show in October. We can tell that beyond just dropping a matte-finish body shell on a frame, the Taco has some off-road enhancements (bead-locking wheels, beefier suspension) and of course a few extras in that winch-bearing bumper.

Sadly, the chances of this being anything but a one-off are zero. But SEMA vehicles have a habit of eventually hitting classic-car auctions — and if that’s too rich, at least it shows America’s army of creative car builders what their next project should be.