Scary movies aren’t so very frightening while they are being filmed, excepting perhaps The Exorcist, where the set was allegedly rife with spooky happenings. They let me go crazy in 2007 on the sets of The Unborn, which was released two years later, and the only scary thought was whether we’d finish the distressing of the rooms in time for shooting. In fact, we were just adding a little atmosphere to the auditorium-like site, with scrapers and house paint. The real conjuring came from the director and production staff, who melded actors, incremental mechanical movements, and lighting into a film that gave moviegoers nightmares.

– Danny Grosso