The poster for John Carpenter's 1978 slasher "Halloween" is scary, subtle, and quite brilliant. It was painted by artist Bob Gleason, and his original poster design sold for $84,000 at an auction in 2016. As Business Insider reported in 2022, Gleason explained in a special auction letter that a hidden symbol in the poster wasn't supposed to be there. If one looks closely at the fist on the poster, one might be able to make out a face in the knuckles and veins. The second knuckle looks a little bit like a nose, while the third and fourth knuckles might be seen as lips (with the veins resembling worms crawling out of the face's orifices).
Gleason assured buyers: that wasn't his intent.
Speaking to Fangoria Magazine in 2022, Gleason explained that he came up with the "Halloween" post