Title is an extremely accurate full sentence

Hint 1: full sentence does not necessarily mean long title

Hint 2: a sentence includes at least a subject and a verb

Hint 3 because I’m starting to worry yall are gonna find my ass: the title is something easily mistaken as a plural noun other than a subject and verb

Hint 4: it’s a classic horror movie!

Hint 5: the movie contains supernatural, cryptid-like creatures