A mate of mine was there and watched it happen.
If you're going to go and play big boys games you've got to be prepared to accept the consequences.
That's why I play with a car that cost me £150.
People often underestimate how much Quarry tightens - it's quite funny. I've had a Mondeo ST that I was following swing out in front of me and sit in a drift for what seemed miles, only to find grip and power off into the in-field. There was also a guy in a Golf3 GTI that was determined he was faster than me and only moved over after putting a couple of wheels on the grass on the outside of Quarry after running waaaaaay wide.
£10 says he didn't have track day insurance, if it was his.
Those RS4s do sound mint, mind.