The movie "Backrooms" has had a strong opening at the box office, with reports suggesting it debuted with $81.5 million. However, there are conflicting reports about its performance, with some outlets suggesting it could have started with over $40 million or even surpassed $100 million domestically. The film appears to have broken records for its studio, A24, and is performing well compared to other movies, including "Star Wars: Mandalorian and Grogu" and "Obsession".