There’s a peculiar, illicit pleasure in witnessing a horror film that doesn’t bother appeasing the grown-up urge for context, or even moral justification, a film that simply wants to stalk you, amuse itself, and then gut you, all while wearing a fixed rictus grin. "Terrifier" announces itself with the blank-eyed mirth of Art the Clown: a creation not born so much from the tradition of slasher villains as from the very tactics of a mean-spirited magician. There is no myth, no tragic back-story, the movie barely bothers with plot at all, but dances with the sharp, ecstatic purity of a bad dream that keeps plunging into new depths.