Couldn't find this thread but the Search facility worked!
First I tried "pinched" then "copied" which brought me here.
Not an "Unfortunately Similar Musical Moment" but one that I heard yesterday and realised it was the one I'd been trying to recall when I first came across this thread ages ago.
In the last movement of Rachmaninov's 2nd Piano concerto I always hear the words "J'ai vu passer l'hirondelle" in my head as it's the same tune as the opening line of a song I used to sing over 25 years ago - I think it's called Villanelle. Anyone else know it? Pretty little song. It was fun to sing.
Just found it by googling:
"Villanelle" published 1893.
J'ai vu passer l'hirondelle
Dans le ciel pur du matin:
Elle allait, à tire-d'aile,
Vers le pays où l'appelle
Le soleil et le jasmin.
J'ai vu passer l'hirondelle!
J'ai longtemps suivi des yeux
Le vol de la voyageuse...
Depuis, mon âme rêveuse
L'accompagne par les cieux.
Ah! ah! au pays mystérieux!
Et j'aurais voulu comme elle
Suivre le même chemin...
J'ai vu passer l'hirondelle, etc.
by Eva Dell'Acqua (1856-1930)
Words by Frédéric van der Elst