"Don't Answer Me"

Yester-day was the fortieth anniversary of the release of Ammonia Avenue.  I listened to the album and started wondering whether the three syllables of "ev'ryone" in the line "Run away and hide from ev'ryone" in "Don't Answer Me" are sung to all different pitches.  This turned out not to be the case (the pitches are G Ab G), but after looking into this, I had a different realization.  Under the lines "Run away and hide from ev'ryone / Can you change the things we've said and done?," the chord progression includes two Bb majors.  Since the song is in C major, the root of Bb major is an accidental, and this foreign tone provides something of a sense of the distance involved in "run[ning] away" and of that "chang[ing]."  In the vocal line above this, there are also some accidentals (Eb and Ab) that contribute to this effect.