Warning: If the following illusion makes you nauseous or dizzy, please scroll down to the next post.

The Purple Nurple, as this illusion is called, is what’s known as an anomalous motion illusion (sometimes grouped in with animation optical illusions), whereby a series of shapes and colors creates the appearance of movement while staying completely still. The illusion style was first created, studied and perfected by Professor Akiyoshi Kitaoka, who noticed that certain images appear to move when viewed with your peripheral vision.

The effect is utterly surreal, making the viewer feel as though he or she is on some type of psychedelic drug, even if he or she has never messed with the stuff before. This particular image was created by Walter Anthony.