Well here is something I found on internet about phasing (this is from Star Trek):
"A molecular phase inverter was a device capable of altering the normal structure of matter, enabling it to pass through normal matter and energy. Such "phased" matter could no longer physically interact with its environment, but could interact with other, similarly-phased matter."
and here is my idea on the subject:
An interdimensional teleport device starts the teleport the car in to an other dimension, but the process stops at closely halfway (the car exist 60% in it's original dimension and 40% in the other) and the car is in both dimension. The reason why the car is still respond normally, because it's still exist in it's original dimension and the planet surface is the last thing the car touched, the gravity is still in effect. (this stuff is )
If someone have a better idea or add to it, feel free to do so.