Loose rock clattered, and hooves echoed on stone as Fess walked into the cave.

Behind him a horse screamed, and rocks clattered down the slope.

Brush shook, trees stirred, and rocks clattered against one another.

The rock clattered to a stop somewhere in the shadows.

The rock crashed and clattered on the boulders.

A rock on the center hump scraped and clattered against the undercarriage.

A rock clattered against the steps, yards away.

It was followed by a series of cracks as the rock clattered across the hood of a car and dropped to the pavement.

Ice and rock clattered down, smashing against his suit.

Someone had shifted carelessly, and a rock clattered.