Appears in: Ghostbusters (1984)
Scariest moment: Ruining an otherwise enjoyable apartment party, the ferocious beast chases Louis Tully (Rick Moranis) out of the high-rise building and right into the glass wall of a swanky restaurant.
Weakness: Possessed vacuum cleaners.

For a second there, Louis Tully is on the verge of scoring. A textbook nerd, he's stepping out of his league to kick game to a tall, buxom blonde who's attending Louis' apartment party. But there's a knock at the door, and the gathering's latest guests give Louis their coats; thinking nothing of it, he tosses their outerwear into the closet, onto the head of the possessed dog nobody has noticed.

Hearing the growls from inside the closet, Louis playfully asks, "OK, who brought the dog?" If only it was a cute Golden Retriever. Instead, it's a four-legged gargoyle with horns, and it's terrifying.