Answer: "Rumbling herd" is a metaphor that refers to a large group of people or animals moving together, creating a noise like a herd of animals. The metaphor is often used to describe a crowd or throng of people, and the sense of movement and momentum can convey excitement, energy, or power. In this context, the herd is considered to be "rumbling" as it moves, suggesting a low, vibrating noise created by the sheer number of bodies in motion. The metaphor is often used to describe a large and seemingly unstoppable force, and can convey both a sense of power and a sense of potential danger.
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