Even still, loose rocks often shifted beneath Khan's feet, threatening his balance.

As a re- sult, each rock shifted constantly within the general plunge.

The loose rocks underneath our feet shifted with each step.

Limping, I worked my way along a slope, worrying that a rock beneath the snow would shift and cause me to fall.

The rock shifted, but so did the Herald.

When they shifted, sliding like ball bearings, the rocks would shift in turn.

Undaunted, the woman started working at the side of the stone, and she jumped back as the rock suddenly shifted.

The rocks shifted, slightly; the logs moved and swung around, the water surged forward.

The rock beside him shifted and Karnak froze, waiting for the crushing death.

She stepped back, close to him, as what had seemed to be solid rock shifted.