The first post-credits scene of Sinners has more depth than you may think, thanks to a crucial casting detail. Music is crucial to Ryan Coogler's recent horror film. The blues are an influential part of Black culture, and were especially so during the Jim Crow era; the film shows how the blues transcend generations. It also speaks to how important cultural identity is to a community, and why preserving it is vital, when conforming could be easier. While Sinners has bloody vampire action, it has a unique voice that many movies are missing.