Suddenly the ground below began to tremble and the stones shifted.

He stumbled and almost fell as the stone behind him shifted, sliding sideways for half a yard before grinding to a halt.

The stones I knelt on shifted slightly; narrow cracks opened up under me.

Long ages passed; cold and rain seeped through him; stones shifted within him.

The stone shifted under their feet, alive and unstable.

A stone shifted beneath one of the Dremords, and he lurched slightly to one side.

He walked gingerly, the stones shifted even under his weight.

Nothing happened for a handful of heartbeats, then the stones shifted beneath my feet.

It was hideously dark and the loose stones were shifting under her feet again.

Over the years stones had shifted, giving hand and foot holds; bushes had grown in the gaps.