Yep yep yep -- all good suggestions. You guys have the hang of it! Keep the ideas flowing, especially lesser-known films. Brook, Wonderland is a great suggestion. A terrific picture that I had forgotten about.
Who's up for a challenge? I'm building a list of films that fit a particular criteria: interwoven characters and plot lines. Variety calls them "criss-crossers." They are different from ensemble films (like The Big Chill): criss-crossers have separate narratives that overlap in often...