Night of the Mannequins

We thought we'd play a fun prank on her, and now most of us are dead.

One last laugh for the summer as it winds down. One last prank just to scare a friend. Bringing a mannequin into a theater is just some harmless fun, right? Until it wakes up. Until it starts killing.

Luckily, Sawyer has a plan. He’ll be a hero. He'll save everyone to the best of his ability. He'll do whatever he needs to so he can save the day.

That's the thing about heroes—sometimes you have to become a monster first.

Synopsis from Open Library.