This sound is best understood as a general cavern ambience clip rather than a quote or named meme. Short cave atmosphere loops like this are widely used in gaming edits, horror posts and fantasy videos to suggest underground space immediately. Their popularity comes from how quickly echo and reverb tell the viewer where a scene is happening, even before any visuals fully explain it. Because the clip is short, creators often loop it or layer it with footsteps, drips and low rumbles for a fuller cave environment.