How odd is Odd? When we meet Odd Horten, he is driving the Oslo-Bergen express train through a blue-white snowy landscape. (This opening-credits sequence is gorgeous: each dive into a tunnel, each returning plunge through a circle of searing white, is a cinematic marvel.) But a young railroad employee catching a ride up front with Odd finds that it’s very hard to draw him into conversation. Questions and comments get monosyllabic replies, if any. Why is that?