The world is full of creepy things. I mean, just take a look at clowns. Why the hell do they exist? Why thought they'd be funny? Why are they so pale? If anything they're something to be scared of!
Clowns are man-made creations though, even if you strip away the insane machinations of humanity, we're still left with some super frightening crap that's naturally roaming around the earth right now. I mean, have you ever seen a cassowary? They're basically modern-day velociraptors that love killing human beings and being generally evil.
And it's crazy for me to say, but there's something I find even creepier than giant, human-killing birds.