All my movies are about visual (optical) illusions and have to move to perceive the illusion. This movie is a typical example of the movies on my channel. My movies can be strange or even a bit scary but have no screamers. The ballerina and the fence in this movie are rotating together as one rigid thing. No joints. Nontheless we perceive the ballerina rotating in a different way as the fence. This is known as the Ames window effect. The fence (window) has a build in perspective. It looks like we see the fence a bit from the side but it isn't. When we try to get this video into our brain, we make a beautiful mistake. I like to thank Nikola Dechev who made the 3D model of the ballerina.