I read this on another forum......
"A couple of us noticed what we thought was a pitch wobble with GG as it banked down into the "Valley of Speed", that hadn't been there the prior 2 laps. I noticed it but said nothing, figuring I didn't know enough to comment. There were 2 guys next to me, both pilots. One said " did you see Ghost has the shakes" and the other guy said "Sure did". Then it happened. We'll never know, as I am not sure if anyone was shooting video at that moment from our location. We were packed quickly into buses right after it happened and our only concern at that point was what the situation in the stands was."
And another....
"I got an email from Bob Martin today. He said, as captain of pylon 1, he was standing about 500 feet from the impact site. He said that the trim tab did partially depart, causing a violent pitch up. He is sure that the g-force caused Jimmy to black out, which would explain the roll over with no throttle change or course change. Bob also said that the box seats were virtually empty compared to how they would have been on Saturday and Sunday."