I'm not persuaded it's a car at all. Could be balloons or something else.
I'd like to know how anyone can infer that the thing is moving at all (unless there are other frames available).
I have no idea what it is. But based on what I see in this photo, I think it is a stretch to conclude that we're looking at a flying car.
Being from Albuquerque, home of the Balloon Fiesta, balloon casting a shadow was my first thought too.