Actually pretty creepy.
Posts tagged visual phenomena
Spiralling snakes, anyone?
Want to see something crude but clever?
This guy draws pictures that appear at first to be quite obscene, but then he adds a few simple extras and they transform into things you’d probably expect to see in a kid’s colouring book :)
Stare at the center of this flag for about 30 seconds. Now close your eyes.
What do you see :)?