<<The brake rotor shown looks like one of the new Ceramic rotors Porsche has started offering as a ~$8000 option. Either the rotor exploded - which has happened at times - or was broken in the accident.>>
That car was too old to have ceramic brakes. But, I've seen brake discs broken in pieces like a dropped dinner plate. In those cases the car had been airborne after shedding the wheel assembly. Twenty minutes after one of these track incidents, I picked up a piece of shattered disc and burned my fingers. Street driven cars don't need ceramic discs. And, if you nick one when pulling a wheel, the disc (rotor) must be replaced. RLE