9. Night of the Lepus (1972)
Forget The China Syndrome, here's a real tale of man's recklessness wreaking environmental havoc. When their natural predators are all killed off, one species begins to relentlessly reproduce and devour all in their path. And then hormone treatments to stop them instead make them giant and all-powerful. None will survive this onslaught... of bunny rabbits. Seriously. Adorable bunny rabbits, scampering around model sets. That's what this movie is. This is supposed to be scary. Night of the Lepus ("Lepus," being the genus of animal to which rabbits belong, and apparently the only classification they have that sounds remotely intimidating) has the most huggable, cuddle-able film monsters of all time. http://youtu.be/xulXFB3-A3c