A24 has released the final Backrooms trailer, and if you have been sleeping on this one, now is the time to pay attention. The film arrives in theaters on May 29, and its origin story is unlike anything else heading to screens this year. It started as a single anonymous photograph posted on a paranormal message board in 2019 and grew into one of the internet’s scariest urban legends . From a 4chan post to an A24 feature film A24 / A24 In 2019, someone on 4chan’s paranormal board posted a photograph of a large, empty, yellow-lit carpeted room. It looked like somewhere you might vaguely recognize but couldn’t quite place, and that unease is the entire point. These spaces are called liminal spaces, and the Backrooms became the internet’s definitive version of the concept. The mythology is simple but effective.…