Space!! It's a huge place, but there's only room for one winner in these matches. Sure, we could have pitted two classics like Alien or The Thing against each other. But what fun is that? We want movies that don't usually end up in that discussion. Enter Slither in this corner and Event Horizon in the next. It doesn't matter if you stay here on earth or go millions of years into space.....death will find a way to come get you.