Commentary is referring to the race finish at the 2009 ALMS final round at Laguna Seca, where an incredible battle for the lead between this Porsche and the Corvette in post #6440503 culminated in the 911 running the 'Vette into the pit wall, sending it across the track and skidding over the line to finish in a wreck.
Video here with commentary from the 'Vette driver, and a longer video with some of the laps before the incident - really some of the most insane GT racing I've seen.
I was there for that race, right on the pit straight out of the last corner. To this day it's the craziest sporting finish I've ever seen live. A Ferrari had bumped that same Porsche out of the way earlier in the season to take the victory at Sebring, so I guess Bergmeister wasn't going to let that slide a second time.