I'm really disappointed - this being a Professional Pilots Forum - that none of you are questioning the official version of this event. A baggage loader successfully operating the systems of a Q400, taxying, takeoff, loops / rolls near ground level at first try? I was born on a day but that day wasn't yesterday.
I guess this is how the System keeps us in check. If you point out the holes in the story of these events you probably won't be a professional pilot for very long....