More ideas from desy
Stare at this for 20-40 seconds, look at something else, then nearly have a heart attack

Stare at the center (while the gif is playing) for 20 to 40 seconds, then look at your hand - That's so cool! Then look at the screen!

Best Of 2012: The Ultimate Art-Inspired GIF Guide | The Creators Project

First, stare at the center of this spiral for 30 to 60 seconds. We can now take a trip to Rapture, an underwater city from the BioShock video game series, thanks to an animated spiral optical illus.