Alligators: they have big teeth, and they're fast. Most of the time these cold-blooded animals are too busy lounging in the sun to eat any humans, but sometimes they get hungry, just like any omnivore. Some gators are cannibals, and others eat entire cows. They're sneaky and just a little too smart for comfort — in the process of consuming prey, they do some pretty messed up stuff. These photos and videos of the scariest alligator encounters highlight just how terrifying these massive reptiles can be. Vote up the ones that will haunt your swampiest nightmares!