The wall of thorns shook and quivered, and something massive bellowed again and tore through it, into the open.

Suddenly there was a great noise and the walls of the chasm quivered and echoed.

The noise was becoming louder; the walls themselves were quivering, the ground pitching.

Harry thought of snakes again, for the walls of the box quivered as if pressed from inside by coils.

For a long moment the walls quivered with light and sound.

The wall of bones quivered.

For there was a mighty roaring from behind and the walls and floor quivered.

The thatched walls quivered at his wrath.

The wall quivered like a horse's skin when a fly lands.

It felt as if the very air shrugged, then the wall quivered again, and the mirror began to sink back into the wall.