Winner of the Best Visual Illusion of the Year Contest 2010 http://illusioncontest.neuralcorrelate.com Koukichi Sugihara Meiji Institute for Advanced Study of Mathematical Sciences, Japan In this video, wooden balls roll up the slopes just as if they are pulled by a magnet. The behavior of the balls seems impossible, because it is against the gravity. The video is not a computer graphic, but
![YouTube - Impossible motion: magnet-like slopes](https://cdn-ak-scissors.b.st-hatena.com/image/square/d76fd1eee2dba423a115c5c3881a7270d52e8ff3/height=288;version=1;width=512/https%3A%2F%2Fi.ytimg.com%2Fvi%2FhAXm0dIuyug%2Fhqdefault.jpg)