This is quite possibly the most disturbing Halloween costume ever. Seriously. It nailed creepy down to a tee. A friend of Redditor YouHadMeAtBacon did this gory unzipped zipper face makeup, and it's by far the best I've ever seen.
The following videos were brought to my attention in the comments below. The first one is by C Schönijahn and the second by Rocketcarmike. If you click through to YouTube, there's a brief written guide in each description.
This one is by beeisforbeeauty.
Next up is cristalprostyler's version.
And here is BeautifulYouTV's unzipped face tutorial.
To go all out and unzip most of your body, Francesco Sanseverino has you covered.
Can't decide if you want to be a zombie or zipperface for Halloween? Try both. Use this guide from Shaaanxo.
Reveal your inner animal spirit with this clever unzipped look that combines Little Red Riding Hood with the Big Bad Wolf. By NeckUpDesign.
Want pro results? Check out this version by ellimacs sfx makeup.
Or try out Shuga Be Brave's unzipped eye version.