The rock shuddered, reddened, then began to tilt forward.

The very rock shuddered with the urgency of it, and the surface of the pool rippled nervously.

The solid rock beneath Sulu's boots shuddered, like the deck of a starship that had just taken a heavy phaser barrage.

The rock under him, wet, hot, shuddered as someone in another drift set off a charge.

The rocks of it still roared and shuddered underfoot.

The rock shuddered again and Pandaras sat down hard, trembling with fear.

The rock shuddered and groaned beneath their feet.

As if in answer, the rock shuddered.

The rocks around him shuddered.

The rock shuddered, trying to rotate its own weight.