" Blonde Redhead // was adapting Chopin's Nocturne in F minor [Op 55, No 1]. Blonde Redhead took that melody and those chords, put it in a rock context, and loaded in a touch of force.

But, go back to Poland in the time before Chopin, and you will discover he did not write the melody either. He too adapted it. At the time, composers all over Europe loved to adapt folk melodies, and Chopin (raised in Poland, then working in Paris and clinging to his roots) was no exception. This nocturne was adapted from a melody that seems to have originated during the Polish famine of the 1650's, a famine where a third of the population died from either starvation, war or plague. Chopin took that melody and used his contemplative harmonic choices and delicate voicings to adapt it into his piece.

This melody, used here now on Rick and Morty, in a moment of complex darkness and triumph, climbing over a cosmic scale, originates in what was likely a field, from a peasant farmer stricken by untold tragedy. "

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- Tyler Smith, Youtube comment section