9. Christmas Evil
So there are dozens of truly horrible Christmas themed horror movies out there, but Christmas Evil, amazingly does not suck. In fact this super-twisted slasher flick featuring an axe-wielding basket case in a Santa suit is about a million times better than you'd expect a film like this to be. So why are we including this in a list of sci-fi and fantasy films? Well, to explain, we kind of have to give you a HUGE SPOILER. The end of the movie is bonkers; during its climax the killer is chased by both the police and an angry mob off a cliff at which point his van FLIES INTO THE SKY like Santa's sleigh to the amazement of a crowd of onlookers. Now, it's important to understand, up until this point the film has been grounded in reality, so that final twist is a doozy!