9. Gremlins
What Their Deal Is: Mogwais arent all as amicable as Gizmo; most of them are little scheming bastards. Lucky that theyre harmless little furballs well, unless they eat after midnight that is, in which case they become vile, razor-clawed reptilian monsters. Oh and if you get em wet, they multiply in a matter of moments. Youd be forgiven for thinking that Gizmo, the original Mogwai, was a cute little fella, but hes actually a Pandoras Box death and destruction that in reality, would most likely bring about the end of days.
Why Theyd Be Unstoppable: Well, what constitutes wet? Can a wet spot on a carpet be enough to trigger a birthing? Surely theres moisture in most food, and they need to eat. I wager that within a week of introducing one of these things into society, there would be at least a million of them in existence. And how do you stop a million Mogwais from eating after midnight? If these creatures ever existed in reality, I wouldnt be writing this article right now Im certain, Id be part of a roving band of human survivors living in a post-apocalyptic world ruled by malevolent Gremlins, in which I could only travel by day (UV light kills these fellas remember?).