At work, when we occasionally have to reboot a card reader, it plays three notes that just so happens to be the same first three notes in the Tron anthem. “Do do dooo.” I, of course, can never stop myself from singing the next few notes. And it makes me imagine all the little Programs running around inside the checkout counter equipment, busy at work just as I am.
Relatedly, whenever I keep my fridge open for too long, it plays a warning tune that is the first three notes from the alien’s song in Close Encounters of the Third Kind. Again, I can’t stop myself from humming the other notes.