Perspective Experimental
Leonardo DiCaprio plays the main character in Inception. In the movie, the agents must penetrate through the victims dream in order to stop the decision that will change the lives of many. The agents must go within each level of a dream and take to that level differently. As they go deeper, the danger increases. Also, as one goes deeper, their sense of reality skews. For example, Cobb's wife thinks that the level  that she has entered was a dream and needs an exit from that level. She ends up committing suicide due to her loss of perspective in her place in the dream world.