I couldn't believe this video when I first saw it - I actually had to rub my eyes a few times just to make sure I wasn't imagining what I was seeing. This is the opening ceremony for the Chinese Youth Olympics, held in Nanjing. A hundred acrobats, with the help of hundreds of rope pullers, dance in the sky, exploding into sudden movement as if they were human fireworks. What an incredible performance - in both idea and execution. Have you ever seen anything like it?