Controlled by Mary Shaw, Billy unhinges his jaw and snaps it shut, moving his body in stiff, jerky motions. Horror movies make you question who controls whom—the dummy or the ventriloquist?

Slappy the ventriloquist dummy is one of the most enduring characters from "Goosebumps," a kid-friendly horror anthology book series that was turned into a TV series and two feature films.

Science-fiction movies have a long history with robots, with dangerous and terrifying models appearing every year to scare and intrigue sci-fi fans.

There are some truly terrifying scary doll movies — here is where you can watch the best ones.

USA has released an 8-minute-plus horror movie clip after part of it was used in a scene from Mr. Robot season 2. The film features some familiar elements.