Members of a punk-rock band playing at a remote neo-Nazi bar inadvertently witness a murder and barricade themselves in the place’s performers’ waiting room while the skinheads ready the attack dogs. Jeremy Saulnier’s (Blue Ruin) intricately crafted, visceral grindhouse thriller is a splatter flick to be sure, but one that’s unpredictable, original and never superfluous. The late Anton Yelchin and Imogen Poots head up the talented cast, opposite a terrific Patrick Stewart playing against type as the skinheads’ villainous leader. Methodically paced but incredibly tense, this one will get under your skin. (95 min)