If you do not, the slab will probably shift again soon.

'You just have to-' The slab shifted under her, and tipped her off.

The monks pressed on and the slab shifted again.

'Without a purchase that slab will never shift.'

Slipping, sliding, afraid that the jumbled slabs of ice would shift and catch him like a bug between two bricks, he climbed out of the first chamber.

On cue, a slab of stone shifted, revealing an alcove, and Vierna Do'Urden, Dinin's lone surviving sibling, swept into the room.

Another loud boom sounded deep within the mountain, a grinding of rock as broken slabs shifted and tried to find a new stable point.

The slab of basalt shifted, moving as easily as if it were Styrofoam.

One slab shifted and scraped against her back, startling her with its touch and vibration.

Daphne and her father both pushed, and then pushed harder, and at last the slab shifted, slid to its original position and thumped down flush with the bricks.