It's a baby with adult legs! It's a bird with a CCTV camera for a head! It's a cat the size of an 18-wheeler! 

No, no, they're just optical illusions playing with your perception. While we do wish dogs could fly, or that a baby was playing with a real human hand, we regret to inform you that these pictures aren't what they seem. 

Sometimes what you see is not what you get and in this case, that's the preferable option, as the alternative would be both world-bending and earth-shattering, to say the least. 

So with that in mind, take a gander through this collection of tricky pics messing with your eyes, and be sure to secure your glasses because you're going to need them.