Pretty much sums it up.
Lol'd at him saying the rear broke loose violently, looked pretty progressive from the video. I bet he was just fixated on that raised median thinking "oh sh*t oh sh*t" and not looking where he wanted to be going.
getting it done by a "generic" inspection company is like burning the money and buying sight-unseen. My experience has been they are CLUELESS.
ONLY get it done by an experienced and reputable workshop, or do it yourself.
You don't exactly make it easy by not telling us where the hell you are. If you tell where you are there is probably someone on here that will help you.
DVD has now arrived, fingers crossed the Blu-ray isn't too far away now.
Can you look into firming this up Jools, I'm keen to see it on a big screen with decent audio!
Unfortunately those are the only two I could recommend out this way. You could try BM Workshop in the city, or Team McMillan in Newmarket - bit further away but still better than VTNZ....
The driver put a long post on Bimmerpost explaining what happened... http://f80.bimmerpost.com/forums/showthread.php?t=1075458
Either way, he didn't react brilliantly when the back end start to squirm!