You missed the laps leading up to it. The Vette pulled off an amzing pass down PIT lane, then back onto the track proper that the stewards made him give back. And there was plenty of rubbing preceding what you saw. And the punt by the Vette on the 911 entering the straight.

After watching that race, I thought, "Jeez, that's outa control!" But who to assgn blame to? I couldn't decide. Evidently IMSA agrees, and has put both drivers on probation.