1. Very fast car, turbo Porsche
2. 2nd track day
3. Advanced group
4. Unable to drive car well enough to need instruction (speculation)
5. Gets passed by faster car on preceding straight by guy who is quicker.
6. P guy chases advanced driver into corner after just letting him by.
7. Clearly too close to other car in a corner. P guy did hit him up the rear after all.
8. Red Flag.
9. wreck
10. You guys tell me, what else could have happened.
The P guy should bring the advanced guy a bottle, check, handshake, and a apology.
1,2 and 3 are the reason. 4,5, and 6 were the cause and 7,8 and 9 the result, 10 should be the outcome.
You can't hit ANYTHING, if you do it's your fault unless it's a A Arm failure or some other act of god. Even then you fix the other guys car. Or the fence. Or both.
By the way the red flag could have been waving because here was a massive crash all over the track right in front of the guy who slammed on the brakes. You just have to give some room into a blind exit corner. Geese the instructor should have been all over that. AND who gets advanced from novice to advanced in one day. The point is experience not how fast you can drive the damn car. Damn near anybody can drive a turbo Porsche fast enough to F it up.