Indestructible cars, moon physics, AND idiot AI: Is this the ultimate Gran Turismo 5 glitch?

Give it a click. You know it'll be worth it. So the car spins out. Fine. Then it loses all body mass and launches into the air. Okaaay... And then it bounces undamaged off a couple of other cars and the trackside wall, before eventually coming to rest on top of another car without knocking its newfound steed off course by an inch. Seriously, Polyphony? And then the car underneath gives Jimmy McBrokenphysics