The Spinning Dancer is a kinetic, bistable optical illusion resembling a pirouetting female dancer. Some observers initially see the figure as spinning clockwise & some counterclockwise. Some can see it change rotation direction suddenly https://buff.ly/2KM24au pic.twitter.com/onW0qzjXs4
I experience a similar illusion when I look a Lissajous figureshttps://twitter.com/inertialobservr/status/1163184607128195072?s=21 …
