This comes from my artist friend David Lemon at Clay to Bronze. The disappearing car door is known as the Rotary Drop Door. I believe the cars shown are the Lincoln Mark VIII. JAtech is the developer. It appears both Ford and GM have prototypes of the Rotary Drop Door. See the video below.
Content Scrapers: Until I can figure out what to do about your confiscation of my work for your own website, please be sure to give a link back as shown above.