I almost forgot the Ripsaw Twister was at SEMA... from robotics firm Howe & Howe Technologies

here's a better look, because with bad indoor lighting and people crowded around it's pretty hard to see whats in the photo

https://www.ina.wiki/media/B4z_sJpJ9c0

Several of Mike and Geoff Howe’s robotic land vehicles have been evaluated by the U.S. Army. Its Ripsaw vehicle — the small unmanned tank seen on “Jay Leno’s Garage” — has undergone testing at Picatinny Arsenal in New Jersey. But when sequestration slowed down funding of tests, the Howe brothers looked for other venues to promote it, landing the product a role in the 2015 classic “Mad Max: Fury Road.”

https://www.defensenews.com/industry/2019/01/10/textron-finalizes-acquisition-of-robotics-company/