This is a great video. Really well done documentary style video that shows the practice, the fabrication, the frustration and more. It’s completely different than the type of backflips that monster trucks do now, so you have to watch it. There is a really trick ramp setup that starts the rotation needed, and it’s fun to watch the process and all the practice jumps.
Click play to watch.
The “Bumps” Willard spiral jump in “The Man with the Golden Gun”, done in one take, was far more impressive. Yes, they simulated it in a computer, but it was circa 1970’s.