The movie "Backrooms" has had a significant opening at the box office, with some reports indicating it has surpassed other films such as "Star Wars: Mandalorian and Grogu" worldwide. However, there is uncertainty about its ranking, with some outlets suggesting "Scary Movie" may have taken the top spot in certain markets. The exact box office numbers and rankings are not consistent across all reports, but "Backrooms" is reportedly a major hit, with one outlet noting it has set a record for distributor A24.