The aircraft carried the owner of the airline, Humberto Roca , he is the one responsible for the whole show, supposedly they practiced the manoeuvre a lot, but it also seemed to me the first time I saw the footage that that left wing came too close to the ground.
Huh...? Practice a low-pass?
Not rocket science or Chuck Yeager stuff:
You fly low to the ground with gear and flaps up, they ya ad power and climb back up to the heavens. What seems to be the problem? ...
