The Taco Bell 'Bong' (or 'Dong') sound effect is the signature mnemonic chime used at the end of Taco Bell commercials since the late 1990s. In internet culture, the sound evolved from a corporate brand identifier into a versatile punchline for videos and images depicting physical impacts, head injuries, or sudden realizations. It first gained massive traction on platforms like Vine and YouTube, where creators would sync the 'Bong' to clips of people getting hit in the head or falling over. Today, it stands as one of the most recognizable auditory memes, symbolizing a chaotic 'game over' moment or a sudden, jarring event that resonates with the same metallic intensity as the brand's bell logo.