Jump scare

In practice

A jump scare is a sudden shock, usually an image and a loud sound arriving together, timed to make the audience physically flinch. It is the most recognizable device in horror and turns up in thrillers, comedies and trailers too, because it works on the body before the viewer has time to think.

A jump scare is a release, and it only works after tension. Silence, a slow search, a sound that stops: the audience leans in, and the shock pays that attention off. Used without the build, or too often, it trains the audience to brace and stop feeling dread at all.

On the page, write the build in short action lines and give the shock its own line, with the sound in capitals as the moment calls for it. Then decide what changes because of it. A scare that leaves the characters exactly where they were is a beat the audience will forget; one that costs them something makes the next quiet scene worse.

Writing one on the page

Short lines slow the read and leave white space where the silence is. The shock gets a line of its own, in capitals. The brother is a false scare that releases the tension, and the figure in the field reloads it at once, so the scene ends more frightening than it began.

Where it comes from

Horror filmmakers often trace the device to Cat People (1942). After a long walk in which a woman senses she is being followed, the hiss of a bus pulling up breaks the silence. The trick became so closely tied to the film's producer, Val Lewton, that a false scare of this kind is still called a "Lewton bus".

Later films made the device famous. In Jaws (1975), Ben Gardner's head rolls into the hole in his wrecked boat's hull just as Hooper leans in to look, and the final shot of Carrie (1976) brings a hand up out of the grave after the story seems to be over. Both work because the audience thought the danger had passed.

How a jump scare works

The startle reflex is fast and involuntary, which is why a jump scare works even on viewers who know it is coming. What the filmmaker controls is anticipation: how long the audience waits, what it expects, and when the shock breaks the pattern. A scare that arrives a beat earlier or later than expected lands harder than one exactly on the rhythm.

There are two kinds. The false scare, the Lewton bus, releases tension harmlessly: a cat, a friend, a car horn. The real scare delivers the threat. A good sequence often uses the first to make the audience relax just before the second, or, as in the scene above, uses the release to reveal a worse danger.

How to write it in a script

Write the build so the reader slows down. One beat per line, plenty of white space, sounds and silences described as precisely as images. A reader takes in a page of short lines more slowly than a paragraph, which is the pacing you want on screen.

Give the shock a line of its own and put the key sound or action in capitals, but write what happens rather than how it should feel. Avoid writing "jump scare" or telling the reader to be frightened; the line should do it. Then show the consequence: the next beat should leave the characters in a worse position than before.

Dread versus shock

The common criticism of jump scares is that they are cheap: easy to produce and quickly forgotten. They are cheapest when they replace dread rather than release it. The Exorcist III (1990) is often praised for a hallway scene that holds a long, static wide shot for so long that the shock, when it comes, feels earned.

Mulholland Drive (2001) goes further. A man describes a nightmare about a figure behind a diner, then walks out to see if it is there, and the audience knows exactly what is coming. The scene still frightens, because the dread built by knowing is stronger than surprise. Use shocks sparingly, and let the quiet between them do most of the work.

Common questions