If you loved “The Menu”… just keep on loving it. “Opus” is more of the same, only less so Ayo Edebiri in "Opus." (A24) If horror movies have taught us anything it’s this: Don’t go anywhere. Don’t leave your house, and if you do leave your house, don’t leave your hometown. And if you do leave your hometown, don’t go out to the middle of nowhere. And if you do go out to the middle of nowhere and someone asks you all to surrender your cell phones, skip to the end and run away in terror right now.