This chime comes from Microsoft Windows, where it plays as the default system sound when a USB device is safely removed or unexpectedly disconnected from a computer. Because Windows PCs are so widespread, the sound became instantly recognisable far beyond its original technical purpose. Online creators began lifting it into videos, streams and memes as a shorthand for losing a connection, a player leaving, or a plan collapsing. Its familiarity is the reason it still works: listeners understand the joke in under three seconds without any explanation.