"Anamorphosis" is the technique of distorting an image so that it only looks 'correct' when viewed from a certain perspective. In a still image, it's intriguing enough, but it takes on a new life when viewed as a video.
Video illusionist 'Brusspup' has done just that, using a moving camera perspective to seamlessly transition between the illusion of a 'normal' chair and the distorted reality. Intrigued? Watch the video in action:
Curious about how it was done? Brusspup thoughtfully provides a 'Behind the Scenes' video to explain it:
You can see more of Brusspup's video illusions here.