This is a generic sound effect rather than a quote or clip tied to a specific character or franchise. Door knocking audio has long been used in film, radio, games, and online editing because it communicates a situation instantly. On short-form video platforms, creators use it to set up jump scares, interruption jokes, delivery gags, and fake visitor scenarios. Its lasting popularity comes from how recognizable it is: a few sharp knocks can establish tension, humor, or anticipation in less than a second.