Officially. Unofficially, rumor has it that he might have wanted to shoot two AA guns in a row without a proper approach to the second gun, but rather just doing a quick 180 turn towards it right after shooting at the first gun, with three bombs on board, bleeding all of his speed and being unable to pull out of the dive, therefore shallowly smacking against the ground, bending both props, climbing back up too steeply with the remaining energy, getting super slow and falling out of the sky for a few hundred meters almost vertically into the ground. That moment when "damn I'm behind enemy lines" turns into "damn that's the least of my problems" in five seconds 😕