Robin almost felt as if the walls around her were vibrating slightly in response.

Slowly the crystals began to glow, then to vibrate slightly.

The cage hung in the air, vibrating slightly as Rudy took a closer look.

Through the chair and his feet he felt the floor vibrate slightly.

His hands vibrated slightly but would grow still when he lifted the gun to shoot.

It vibrated slightly at my touch as though it were a living thing.

The interior one was presumably the power unit, and he could see it vibrating slightly.

He felt the stone floor vibrating slightly beneath his feet.

"Fancy meeting you here," he said in that slightly vibrating voice of his which, once upon a time, she had found rather grating.

From beneath came a hum of machinery that made the ground under our feet vibrate slightly.