"Sobre el arco iris" is an interesting film. This is hardly a compliment, as it is clear that the director looked for an extreme, "love-it-or-hate-it" kind of reaction. As it stands, "Sobre el arco iris" is just ok. A Spanish young man buys a video camera and travels to Berlin. All that we see are his recordings. As he sinks deeper into a mental breakdown (whose motives remain ...