Where better to watch movies set in movie theatres than in a theatre that shows movies? The Paramount marks the midpoint of the spookiest month with a double bill of flicks about what happens when the terror spills off the screen. Lamberto Bava’s Dèmoni locks an unsuspecting preview audience in a movie house that’s also a portal to Hell and delivers a demonic eruption that somehow one-ups Alien’s chestburster. Then stay frozen to your seat for Popcorn, a bonkers metahorror of films within films that starts off with Kingston, Jamaica, unsuccessfully standing in for the U.S. It only gets weirder from there. – Richard Whittaker