I had a boss many years ago who was rated in the Lear. He told me (not sure if this was BS or not) that when they practiced getting down to altitude from a catastrophic decompression, this was way before simulators, Lear 20 series, that they pulled the power, rolled the airplane inverted, dropped the gear and out with the speed brakes. This way going into it inverted, as the nose came down, they would only pull positive G's. He told me this story once, but like I said, I did not know if he was pulling my chain.