4. Paprika
Before Leonardo DiCaprio and Joseph Gordon-Levitt plunged into the depths of the unconscious minds, there was Paprika. Endlessly confounding and beautifully imaginative, Satoshi Kon's 2006 year anime depicts a research team who have developed a device which allows he user to view other people's dreams. But when the machine's power is usurped and abused, the lines between dreams and reality don't merely blur but vanish entirely. What follows is a plot line so complex and confounding that Fellini himself would sing its praises.