The top box office hit this past weekend was Lucy, a sci-fi thriller starring Scarlett Johansson and Morgan Freeman about a woman who learns to use 100% of her brain. It's a cool concept with a laughably outdated ending. (SPOILER ALERT: We're about to tell you what happens. Stop reading now if you plan to see it) At the end of the movie, Johansson, a hard-partying college student, is able to utilize 100% of her brain and she transforms into an immortal being.