thats what i hear
I learned that they were landing in formation and the front plane (casey) landed first (the rear plane is supposed to land first while in formation), Gerrys plane got too close and by the time he realized it (apparently you can't see over the nose of a mustang while landing) and started to power up and pull up, the prop was chewing up the tail of caseys. I'm guessing the torque from powering back up to take off again is what flipped it. Instantly burst into flames in front of 25,000 people.
I've read about many, many pilots in training back in WWWII who flipped their mustangs by goosing the throttle on that big V-12 on landing or takeoff.