Photo: A24 Anyone who has ever worked in retail knows there’s something ominous about the back room of the store. Full of boxes and extra stock with the odd flickering light, it’s not a place you want to spend a lot of extra time, even if it gets you away from the hustle and bustle of the sales floor. That’s the gist of the first trailer for the new A24 horror film Backrooms by 20-year-old YouTuber Kane Parsons in his feature directorial debut. In the trailer, a furniture-store employee played