Angelique Jackson Dominique Fishback is sitting backstage waiting to discuss her latest role, starring in Amazon Prime Video’s “Swarm,” when her ears perk up at a familiar sound: an engine revving. On the other side of a partition, an audience watches a particularly tense scene from the show’s fourth episode, titled “Running Scared,” when Fishback’s Dre — a murderous super fan of Ni’jah, a Beyoncé-esque pop star — faces down a group of women who stand between her and attending the singer’s concert. Fishback playfully re-enacts the scene, gripping an imaginary steering wheel and pressing her high-heeled foot down onto a pretend gas pedal that sends her speeding ahead and crashing into Dre’s latest victims. She pulls a funny face and hams it up for a rep’s cellphone camera, unknowingly demonstrating the type of darkly comedic energy that makes “Swarm” so buzzworthy.