Last year I was in Mexico and I bought the creepiest mask I could find from a street vendor. Today I learned about The Momo Challenge. I knew it looked familiar... :
World's Oldest Masks Show Creepy Human Resemblance | Live Science
The Town and the Twelve Creepiest Masks in Movie History - Slideshow - Vulture
Amazon.com: Scariest Masks
19 Scary Masks for Halloween 2019 - Halloween Masks for Adults