Every so often I'll hear a phrase that forms part of a song or phrase that I know. Suddenly I can hear the song playing in my head or my mind finishes off the phrase. What is the correct phrase/word for this sort of unconscious surfacing of memories?
For instance I might hear someone say: Treacle Pudding
The words are unrelated, but the intonation reminds me of the Goldfinger theme tune, so my head tries to finish of the song with the words Tracle Pudding in place of Goldfinger
Another example is I'll hear the words, with the wrong intonation, but my brain still picks up the phrase of song lyrics and it plays out in my head.