Destin over at Smarter Every Day has to be one of our favourite YouTube personalities at the moment. Recently he’s taken to flying helicopters and explaining some of the magic (and debunking some of the myths) behind how they work.

As well as some truly breathtaking scenery and what has to be the world’s best picnic location, this video features one of the best explanations of autorotation that we’ve ever seen. Whether you’re a qualified helicopter pilot or a trainee, or even if you’re just curious, this is a great demonstration of what happens when you switch off the engine and let gravity take over!