Whenever she hears Wagner’s Ride of the Valkyrie my wife inevitably thinks of Emer Fudd singing “Kill the Wabbit! Kill the Wabbit!”
(Although a big Bgs Bunny fan, I think of Apocalypse Now. Or the DR. Manhattan in Vietnam scene in Watchmen, which ripped it off from AN)
When she hears Strauss’ The Blue Danube she thinks of the segment with the cartoon swans in Bob Clampett’s A Corny Concerto (which also had Bugs, although in a another segment (Me, science fiction fan that I am, invariably think of 2001: A Space Odyssey)
Music has a powerful link to memory, and a lot of us no longer think in terms of the original music, but have these other pop-cultural images associated with them, often by dint of repetition. The standard for this used to be associating Rissini’s William Tell Overture with The Lone Ranger, but I suspect that modern kids no longer suffer from that affliction – who the hell watches those old Lone Ranger shows anymore?
Some others:
Aaron Copland’s “Hoe-Down” from the Rodeo Suite – “Beef – It’s what’s for Dinner”
Elmer Bernstein’s theme for The Magnificent Seven – Marlborough cigarettes. (This one marks me as Old. I love the music, but I saw the commercials umpteen times before I saw the movie
Max Steiner’s theme for Gone with the Wind – The opening of WWOR
's (Secaucus NJ) “Million Dollar Movie”. I saw a gazillion movies on Million Dollar Movie – mostly low-budget monster films ad King Kong – before I ever saw Gone with the Wind.
Gounod’s Funeral March of a Marionette – "Alfred Hitchcock Presents – I didn’t even know this music existed before Alfred Hitchcock until I read about it in one of Tom Weller’s books
Ponchielli’s “Dance of the Hours” from La Gioconda – Allan Sherman’s “Hello Muddah, Hello Faddah (A Letter from Camp”) I heard this LONG before I heard the opera. In fact, if Allan Sherman hadn’t ruined it for me, Disney’s Fantasia would have.
I feel fortunate that my mother used to love playing the overture to Bizet’s Carmen while doing housework. I heard it many times over, and never saw The Bad News Bears, so I never made that association with it.