Hate to speculate on these things but I saw it happen. The jet was in a near 90 degree left turn, another racer went by and the jet turned near 90 degrees to exit the course, then corrected another 180 back to the left to re enter the race and pulled a LOT of G. After that there appeared to be no further correction as the jet descended to the ground. Looked like a "classic" G-LOC event.
I was at the races during the week. Very sad about the crash yesterday.
I wrote a summary of what I saw Tuesday/Wednesday, with pictures, and posted it on my web site caro-engineering.com on the "News" page. There were only minor incidents while I was there.