Most Halloween fans who decorate with AtmosFX are already used to being the most popular house in the neighborhood. But it never hurts to reinforce that fact by making the neighbors hear the sheer volume of shrieks (and laughter) that comes from such popularity. Ensure those shrieks keep coming by creating a perfectly timed startle scare – it will make your Halloween display the talk of the neighborhood.

Whether you want to give trick-or-treaters a delightful fright or create an unforgettable moment for your Halloween party guests, motion-triggered startle scares add an interactive element that transforms your decorating display from impressive to absolutely thrilling. As part of our ongoing Digital Decorating 101 series, we can show you how easy it is to set up spine-tingling startle scares that will have your visitors jumping – then laughing – all night long.
What Makes a Great Startle Scare?
It may be stating the obvious, but the magic of a startle scare lies in the element of surprise. Startle scares wait until the perfect moment – when someone approaches – then spring to life with sudden, dramatic appearances that are intended to catch visitors completely off guard.
The best startle scares feature ghostly or supernatural characters that burst into frame, transform suddenly, or materialize out of nowhere. Or think paintings that suddenly come alive with menacing faces, skeletons that leap from their graves, or ghosts that appear without warning. The key is that moment of calm before the storm – everything seems normal, and then BAM! — your AtmosFX Decoration springs its surprise.
Which AtmosFX Decorations Contain Startle Scares?
If you have a scary Halloween-themed AtmosFX Decoration Collection, then you’ve already got some startle scares at the ready. All four of the Ghostly Apparitions decoration collections contain startle scares, as well as all the Bone Chillers and Legends of Halloween decoration collections. It is also true for AtmosFX’s newest (and creepiest!) decoration collection, Nightmares. There are even some playful startle cares, like those on Halloween Monster Bash and Halloween Zombie Bash.
That said, perhaps the easiest way to find a startle scare is to grab Ghostly Jump Scares. Fulfilling a frequent request from longtime fans, this compilation brings together 26 startle scares from eight different AtmosFX Decoration collections. It’s a great way to create in a hurry an instant library of spine-tingling surprises.
The Essential Tool: Sprite Motion Sensor Media Player
To create effective startle scares, you’ll need a motion sensor and media player. We recommend the Sprite Motion Sensor Media Player – a compact device that plays your decorations and triggers them automatically when motion is detected. The Sprite even comes with eight classic AtmosFX startle scares on a USB key to get you started right away.
Many decorators use a media player to play all of their AtmosFX Decorations – they are typically small in size (easy to hide) and it means you don’t have to fuss with a laptop to play them. It is also worth remembering that the Sprite will play all AtmosFX Decorations, even if it is not a startle scare. You can build playlists or even have the motion sensor start any decoration – not just startle scares.
That said, we know most decorators use the motion sensor for startle scares! It detects when someone approaches, instantly triggering your chosen startle scare to play. Once the scare finishes, the display returns to the “buffer” scene, resetting the trap for the next unsuspecting visitor.
Setting Up Your Startle Scare Display
Step 1: Choose and Prepare Your Decorations
Select your startle scare from Ghostly Jump Scares, Nightmares, or any other AtmosFX collection with startle elements. Each startle scare comes with two essential files:
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A buffer file (with “buffer” in the file name) – this is essentially a blank scene that continually loops. This provides a seamless transition to your startle scare scene.
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The main decoration file – this contains your actual startle scare.
Copy both files to a USB drive or SD card, then rename them:
- Buffer file becomes “000.mp4”
- Startle scare file becomes “001.mp4”
Because your media player will play the files in order, it will naturally play the first file in the queue (“000.mp4”) and stay there until prompted. Then, when the motion sensor is triggered, it will automatically play the next scene (“001.mp4”). That’s the startle scare scene. When the startle scare is over, it will reset to the buffer file.
It is also worth noting that the Sprite can trigger multiple decorations – not just one. No matter how many startle scare files you want to trigger, they will all use the same buffer file. Just name the extra decorations “001.mp4”, “002.mp4”, “003.mp4”, and so on.

Step 2: Strategic Motion Sensor Placement
This is where artistry meets strategy. Your motion sensor should be positioned where visitors will naturally walk. Typically, in a Halloween display, you’ve already got a ton of props and other creations to look at. That’s great! As trick-or-treaters or other guests come to take a look, they’ll trigger the motion sensor. For this reason, you’ll want to position the motion sensor fairly close to where the excitement is going to happen. Why? Two reasons. First, you don’t want just anyone who is walking by to trigger the decoration – you want it to be just for the people who are approaching. And that leads us to the second reason: the closer they are, the more of a surprise they’ll get!
In the case of the Sprite, the motion sensor has a 15-foot long cable, which is more than enough length to hide it in a location that will allow you to get a quality scare!
Step 3: Connect and Test
Connect your Sprite to your projector or TV via HDMI, plug in the motion sensor to the ”I/O“port, and power everything up. The Sprite automatically detects your files and begins playing the buffer scene on loop. Of course, you’ll want to test the sensor from different angles and distances to ensure it triggers at just the right moment for maximum surprise.
Where Should I Create My Startle Scare?
When it comes to creating cool startle scares, you are only limited by your imagination. Still we have a few ideas that are always proven winners during Halloween.
The Classic Doorway Scare: Position Hollusion Projection Material in a doorway and your projector inside the house. Then, set your motion sensor on the porch. This is great for trick-or-treaters – when they approach the house, for example, the Grim Reaper from Legends of Halloween will be there to deliver a trick of his own!
Candy Bowl Ambush: This is a similar trick for Halloween night – and a great use for a tablet or computer monitor. Plug the media player and motion sensor into the screen or monitor and use a little Hollusion Projection Material to take the shine off the screen and disguise the edges of the device. Perhaps even stick the screen inside a jack-o-lantern or candy box. Then, as visitors reach for the trick-or-treat bowl…
Graveyard Surprise: Many decorators like to create a haunted cemetery, with some Hollusion Projection Material stretched amongst the tombstones. Then, using the “Skeleton Surprise” individual decoration from Bone Chillers Decoration Collection, you can make it appear that some very angry skeletons have begun to rise from the grave.
UnLiving Portraits: This has been an extremely popular effect for years – and it is still going strong! Savvy decorators have been framing the UnLiving Portraits Decoration Collection, which makes it appear that a gallery of portraits are truly haunted. With a nearby motion sensor triggering the transformation, when people approach the “paintings” to get a better look, they find that the gallery is actually a ghoulerie!
Haunted Mirror: This prop takes a little more work, but is worth the effort. Like the portraits above, this effect utilizes a framed one-way mirror, with a TV or computer monitor behind it. When someone approaches the mirror to see themselves, or perhaps check their Halloween costume makeup, the motion sensor triggers a spirit who appears through the glass.
Of course, we know you all will think of countless more ideas. The best startle scares catch people when they’re focused on something else – reaching for candy, reading a sign, inspecting their costume in a mirror, or admiring other decorations.
Lastly, remember that startle scares are the ones that surprise your guests – then make them smile. You’re creating moments of delightful fright that bring joy to your Halloween celebration – and maybe even giving your neighbors some great stories to tell!
Have you created an amazing startle scare display? WE want to see it – AND your visitors’ reactions! Send us your videos using our AtmosFAN of the Week submission form!
Other articles in the Digital Decorating 101 series:
Digital Decorating 101: Surface Projections
Digital Decorating 101: Creating Hollusions
Digital Decorating 101: Pumpkin Decorating
Digital Decorating 101: 3DFX Form
Digital Decorating 101: The Decorating Disc XL