Back in August, I realized that "I look down" descends (C# A E), musically giving a sense of that "down." Yester-day, I realized that there's more to it than that.
In the first two lines of the bridge, the singer/speaker looks down at his watch, and the watch looks back at him:
And this plane gets closer ev'ry minute I look downThis reciprocal looking is also illustrated in the music. As noted above, "I look down" descends, and - complementing that - "back at me" ascends (A C C#).
To a watch that keeps lookin' back at me