"Causeway" is the dictionary definition of a three-star movie: Risks are taken, sometimes props are mishandled. Jennifer Lawrence juggles colorful beanies, and drops several--but, still, it's a spectacle! Lawrence is a woman in her thirties who has just returned from Afghanistan. Her nurse, Jayne Houdyshell, is helping her to reenter civilian life. The nurse is quietly excellent; she explains that she was once assisting a wounded friend, and she noticed how much she enjoyed the work, and this led to a professional "second act" in her own life. Lawrence, perhaps envious, makes a kind of sneering expression and says, "You have a miserable job." Then she is appalled to think back on the words that have just slipped out of her own mouth. Lawrence claims that she is so, so eager to return to combat. But eventually her actual story spills out: She was in a tank when an explosion occurred. She looked to one side and saw her comrade in flames. She understood ...