Buzzy new thriller Backrooms takes us on an unknowable journey through liminal spaces, the latest film to turn a building into a horror villain Buzzy new thriller Backrooms takes us on an unknowable journey through liminal spaces, the latest film to turn a building into a horror villain W hen architect turned furniture store owner Clark ( Chiwetel Ejiofor ) finds a portal to a mysterious realm of “backrooms” in the basement of his showroom, he struggles to explain it to his therapist, Dr Mary