Try looking at this image and deciphering it until you see the words jumping out at you. You need to move further and further away from the image until the shapes become words and you can read the amusing message hidden in the illusion.
This is an old fashioned, entertaining optical illusion that uses simple geometrical patterns to create a 3D perspective. The brain sees the 3D perspective first, because of the use of white to project the shapes forward and black to create sides and background. The brain only sees the words when they retreat further into the distance.
Archive of illusions.org: