"Happiness Is a Warm Gun"

When I woke up to-day, I was thinking about part of "Happiness Is a Warm Gun" (although I don't think I've listened to The Beatles for well over a year).  It occurred to me that the "down"s in the lines "I need a fix 'cause I'm goin' down" are sung with melismas and that the series of notes to which they're sung descend.  Both times, the "down" is sung to the phrase D C A, so there's a musical representation of the "goin' down"