That airplane hit the ground intact, at a 15-degree nosedown attitude and under power. I suspect that thunderstorm had less to do with the crash than is superficially assumed. If I had been the Rhodesian NTSB, I’d have surmised that Malloch died of a heart attack, perhaps exacerbated by having suddenly flown into hail. If you watch the video taken from the Vampire moments before the storm penetration, there doesn’t seem to be anything like a towering Cu in the area–just lots of apparently typical afternoon weather for the area. Not saying they didn’t hit hail, but I’ve flown into worse, by the look of it. Probably dumb of me, but I survived. I don’t think Malloch had any idea that he was doing anything unusual or inexplicable.