The Rumbling is the apocalyptic event in Attack on Titan, where Eren Yeager releases the Wall Titans to march across the world. Clips of their earth-shaking footsteps and the phrase rumbling right now spread through anime edits on TikTok and YouTube, especially during the final season. Fans reused the deep rumble as a shorthand for an unstoppable force arriving, turning a serious story moment into a meme sound for exaggerated threats and entrances.