One of that car's first outings resulted in a high speed flip. Car acted like a wing and lifted. They then put relief holes in the back somewhere to equal out pressure.
They also lowered the 2nd car and added a front spoiler. When the car flipped on it’s roof and slid the headliner caught fire, then the car flipped back over and knocked off all 4 wheels, the door was flung open and when the track helpers got there they were greeted by Tom and were in shock to see him ok and smiling....