Sam I'll post the video I think I have of Bill's run... the bike appeared to present the problem at about the same point in the track at the top of the lo range gear before the shift to hi. The bike launched hard (enough hard launches like Sam Auto has had and something is bound to happen, right?), sounded crisp in the pits (the new plug wires seemed to help too), accelerated well (Bill left a 15 foot strip in the pits) but coming up on the shift point Bill had a similar reaction to yours (sat up and looked around), so there were enough similarities to confirm it was NOT something Driver instigated!
I'll get the link up for all the videos after wrangling the homestead....
Incredible weekend it was for so many reasons, but the outpouring of Love for Mr. Sam Green was the best!
I'm booking driver coaching with you Sam Green in 2015 at Commerce and Valdosta...if we can get you out of the Tower and Hooters!