Jefferson Airplane's "Greasy Heart"

Yester-day I listened to The Worst of Jefferson Airplane, and I noticed a small thing about "Greasy Heart" (from Crown of Creation), which is a bonus track, although it's inserted into the middle to fit the roughly chronological track listing.

The "falls" in the line "Don't change before the empire falls" has a descending melisma (I'm not sure what specific notes are sung, but the phrase starts on an A and descends to a D), which is a musical representation of the empire falling.