The sound of distant rumbling echoes through the underground metro station, growing louder and more intense as the subway train approaches. The metallic screech of brakes fills the air as the train slows down, the noise bouncing off the tiled walls of the subway tunnel. The arrival of the giant machine is heralded by a gust of wind, stirring up dust and discarded newspapers. Its doors hiss open, inviting passengers on board, before closing again with a sense of finality. The train's departure is marked by the fading echo of its thunderous engine, leaving the station silent once more, awaiting the arrival of the next train.