From Scott Collette, Los Angeles CA:
I am a huge fan of "South Park." Recently they had a trilogy of episodes called the Imaginationland trilogy. Now I'm used to seeing clever and smart film references in "South Park" episodes... but this is one I never would have expected. There is a character who ushers the children into the Imaginationland. His name is Mr. Imagination and he takes them there by singing a song with no rhythm or pattern called "The Imagination Song."
You may view it here: http://www.southparkstudios.com/clips/163661/
I was wrong.
Two nights ago, I watched the 134 minute version of John Cassavetes' "The Killing of a Chinese Bookie" for the first time. The film has a stage character named Mr. Sophistication who wears a top hat and has a mustache drawn on to him. I would never have noticed the physical resemblance that Mr. Imagination bore to Mr. Sophistication had Mr. Sophistication not started singing a song... the Imagination song... with no instruments and no consistency.
This has to be one of the smartest and most obscure film references of all time.