The Cooler King said:
It's probably just a black car parked next to that white one.
I imagine it is a black car next to the white one. Focus on the space betwen the "shadow" and the object. There should be no sign of shadow or much less of a shadow with that little distance between the two.
Look at the rest of the shadows in the picture.
The trees cast no shadow that is visible.
That means the sun is pretty much straight overhead.
Also this picture appears to have been taken from pretty much directly overhead.
If that was the case you would maybe see a sliver of a shadow and not the whole shadow. Even at several meters above ground.
Remember, the trees cast shadows too yet it their shadows are not visible.
Which means that the proportions of the car and shadow are actually improportionate if this was to be a real flying car.
For the "shadow" to equal the size of the car as seen in the picture then the car would need to be much closer to the light source or the car much closer to the ground than is indicated in this picture.
Edit: By the way. I sent the text of my above observations to the author of that site. Maybe that will help debunk or "bunk" the picture. Pretty cool all in all!!