I've always been quite fond of the Talking Heads classic "Once in a Lifetime". When I realized it was about the passage of time and one day asking yourself "well, how did I get here?" it became a bittersweet love.
The extended trailer (see below) for W, Oliver Stone's upcoming biopic of the current president Bush, utilizes the song in this particular context to great effect.
W opens nationwide on Oct. 17th. Can't wait.