A quite fascinating story. It is a good narrative on the shocking indifference the mind can assume when presented with information that it refuses to accept. Since it was such a complete impossiblity (to you) that your car might have been actually stolen, your brain began creating a scenario where the car was merely misplaced and you simply needed to search for it. It is these types of disassociative experiences which cause people to come home after their house was torn apart in a tornado and start folding their clothes they find strewn about and look for a nice place to set them. In short, you remembered how your brain coped with such an experience and was able to author a very interesting insight into your own psyche.