Ryan Coogler’s Sinners, a vampire movie, has a mid-credits scene that serves as a fourth act for the film.In the mid-credits scene, set in 1992 Chicago, the aged blues singer Sammie encounters the vampire versions of Stack and his girlfriend.Stack offers Sammie the chance to become an immortal vampire, but Sammie declines.The post-credits scene shows Sammie performing a gospel song in his father's church, although it's unclear when exactly this scene takes place.