Question

Passage

The wrecking ball hung suspended against the leaden sky, a stationary pendulum of iron and rust, waiting for the signal to begin. Inside the foyer of Oakridge, Helen stood amidst the plaster dust, watching the wallpaper peel from the laths like desiccated skin. For three hours, the workers had labored in silence, their movements deliberate and heavy, wrapping the chandeliers in grey canvas, dismantling the pine balustrade spike by spike. The stillness of the house was absolute, preserved in the amber of its final afternoon. Each tick of her watch seemed to resonate through the hollow floorboards, a slow, rhythmic knell for the family history that was about to be pulverized.

Then, a worker dropped a heavy iron prybar onto the marble floor.

The sharp clang shattered the silence, and with it, the linear progression of the afternoon. Instantly, the dust motes in the air seemed to spin with violent velocity. The year was no longer the present; it was the summer of her twelfth year, when the house was loud with the laughter of cousins she had not seen in decades. The hallway flooded with the smell of peaches and damp flannel, the sound of her grandmother’s piano scaling a Chopin nocturne, the frantic, overlapping chatter of a Sunday dinner. Images cascaded over her in a breathless blur: a spilled glass of lemonade staining the white linen, the flash of her brother’s red kite caught in the elm tree, the sudden, terrifying shadow of the Great War that would soon empty these rooms. Decades of grief, celebration, and departure compressed into a single, breathless inhalation. It was a dizzying acceleration of time, a lifetime reduced to a carousel of sensory fragments spinning too fast to grasp.

A hand touched her shoulder.

'Ma'am, we're ready to clear the building,' the foreman said.

The world decelerated back into the cold, quiet present. The piano music evaporated into the smell of damp rot, and the cousins vanished back into the earth. The pendulum outside began its swing.

Question
In the third paragraph ('The sharp clang... sensory fragments spinning too fast to grasp'), how does the sudden shift in narrative pacing function thematically?