The tech guy was VERY adament in telling me that if I ran faster than a 13.50 they would kick me off the track immediately. It was written on my back window and was told at the tech shed when I got my 13.6 timeslip to be careful.
I think it had to do with the Junior Dragsters being out there. Maybe there was an NHRA official out there and if they see a non-rollbarred vert run a 12 they might get in trouble or something