Boosted staged last......which means Petey should have been sitting there with his finger on the button already..........are you saying the car would rock when he decked it?.......Don't think I buy that.

When you are staging, rolling up and grab the brake.....yes, some cars tend to rock. But just sitting there, car not moving, brake engaged, deck it....should NOT move.

I think when Dave started backing up, he flinched and the car "jerked" like the turbo cars do when bumping in. Wasn't bad, but it DID move