'Hereditary': Why in the movies, home is the worst place to be

Ari Aster's terrifying debut feature "Hereditary" begins with an extraordinary opening shot. In a cluttered room, the camera gently zooms in on an elaborate dolls house, singling out a first-floor bedroom, completed in intricate detail. As the diorama fills the lens, a man -- real, flesh and blood -- walks through the bedroom door, shaking his son out of sleep. The boy is late for his grandmother's funeral.