Dizzy Illusion - stare at this for 30 seconds, then look at your hand
Cool Gif: Starry Night Optical Illusion - Socks On An Octopus
22 Optical Illusion GIFs That Will Freak You Out>>> cross your eyes and you'll see eyes.
Don`t Believe Your Eyes: Nifty Optical Illusions
22 optical illusion gifs that will make you feel high
Optical Illusion Gifs That Will Make You Feel Like You're Seeing Things