Main Horror Element
Shadows that only move when you're not looking. You're locked in a dark theatre after the last show, and silhouettes creep out of the wings and from under the seats. They freeze in your lamp beam, but everything behind you keeps coming. Each one is cast as a huge shadow puppet on the screen at the back of the stage, growing as it closes in. Over three acts the shadows lunge when you look away and snuff out your candelabras. In the final act your own shadow detaches and follows you, and light can't stop it.