Peek-a-boo
Does this cat make you question reality? We certainly can imagine that the kitty couldn’t want anything more than to stick his head inside this big pack of food. The optical illusion makes it look like the face on the pack of cat food is the real face of the kitty.
Whereas in reality, this cat could appear to be a lot different than the image of the one on the pack. If at all we saw a cat doing this, we would certainly need to take a second look to perceive that there’s really a separation between the cat and pack.