There are moments in theater when a single performer holds an entire audience in the palm of her hand — and Samantha Inside Out is that kind of show. Elizabeth Heflin delivers a tour de force in playwright Marisa Smith’s fiercely intelligent world premiere, now playing at the New Jersey Repertory Company in Long Branch. Samantha is every woman who has ever swallowed her fury, smoothed her dress, and smiled through the indignity of a life that no longer fits. In one electrifying evening, she unravels, reimagines, and reclaims herself — with rapier wit, raw honesty, and a daughter’s wardrobe as her armor. Smith’s writing is both comic and devastating, and Heflin’s performance is nothing short of revelatory. If you have ever asked “Why don’t women leave?” — or if you have been the woman asking it — this is the play you need to see.