Terrence O'Brien is the Verge’s weekend editor. He has over 18 years of experience, including 10 years as managing editor at Engadget. The Kane Parsons’ film Backrooms is expected to earn up to $90 million in its opening weekend after pulling down $38 million on Friday alone. That’s not only above expectations , but absolutely obliterates A24’s previous opening weekend record of $25.5 million for Alex Garland’s Civil War . It’s also a better opening day than The Mandalorian and Grogu , which only pulled down $33.7 million on its way to a total $81.6 million for the weekend. That also means that Backrooms is an incredibly profitable movie, with an estimated $10 million budget. By comparison, the latest Star Wars disappointment cost $165 million and was considered affordable compared to other entries in the series. While Backrooms hasn’t received quite as much universal praise as fellow low-budget horror breakout Obsession , it’s still largely getting positive reviews.…