8½
An extremely interesting and surreal approach to exploring the human subconscious and psyche.
Blending old memories of Guido's childhood and dream-like sequences with the physical world allows the film to speak about memory. We don't tend to remember the distant past as it actually happened, it often merges with our present self.
The sudden cuts in and out of these two states (with little to no stylistic differences) directly connects past defining memories with Guido's present self and explains his inclinations, personality traits, and egos.
Guido abandons the impossible science fiction film he was "working on". All of the characters from his memories, his dreams, and his messy reality grab hands and form a circus ring, marching together. Wholeness and art are born from understanding that all your memories, including the good, bad, and ugly ones, make up who you are.