Editor and Sound Mixer Walter Murch’s comments about this opening sequence [mp3]:
A hovering perspective, hypnotic in its descent. Union Square bustles. Through the first transition programmable servo lens, engineered for this very shot, we hone in on a thousand little theaters settling on a disquieting mime. Long reaching shadows breed paranoia as the wondrous sound design is at once jazzy and dissonant, much like Harry Caul himself.
[click to watch - format: QuickTime H.264, 720×400 | Size: 37 MB]
[thanks to ut.tumblr.com]