On Reddit, someone posted a video that shows the strangest optical illusion ever. Initially, there appears to be a dog’s head on the roof of a building. Yet it’s actually the black dots against the white fur of a cat’s butt.
When the cat moves, you can see how it’s backside resembles the face of a dog. This allows the cat to frighten away predators when they wonder how a decapitated head of a dog could be looking back at them.