You have to think outside the roam of what you think is logical. What I mean by that is, if you see a RC Plane do a stunt, it is possible for a real plane to perform the same stunt. The only other factor you have is the G force put on the actual pilot. Now G force is controlled by gravity forces pushing our bodies back towards the earth's mass, we all know that. Now if you created an opposite force that pushed against the mass of the earth in a equal ratio you would then be in a no gravity state. This making any maneuver possible, if you think outside the technological age we are in now. We do have technology now that uses the Earth's magnetic field to fly a plane without an engine but this is in the baby stages of design. But even that doesn't stop the G-Force Earth has on a pilot, until that technology arises, we are still controlled by gravity. And, yes I am a mathmatical geek, I love it.
I'm not saying this video is fake or real I don't know and really don't care because it is possible reguardless and alot more stunts greater then that if you step outside the logic of our own technological age. Think a 1,000 years in the future what will we be able to do?? Now think 100,000 years in the future and what planets we'll have explored and the speeds we might travel at?? It is possible, not only plausible but a reality!