Thanks a lot for your informative write up.I wish I hadn't just acquired a reason to find it interesting:
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Happened today, I also got rear ended - though not at quite the speed you seem to have been hit; the other car was thrown off the road down an embankment and across a ditch; had to call emergency services for the other driver, he had a bleeding head wound and chest pain after his airbag deployed.
I walked away without any hurt whatsoever.
As for my Tesla: The rear bumper came off completely, the trunk was pushed in about 1 foot. Stil, it left the site of the crash under its own power even if it's no longer street-legal.
The experience is not immediately comparable since my accident was in Europe. Also, I had stopped far enough from the car in front of me that I didn't get any damage in the front from being pushed forward.
I guess this means totaling the car won't be an option. The time frame of about 6 months for repairs is what's most frightening for me at the moment.
wish me luck in getting this resolved