The walls and floor, the very air, were trembling again as the helicopters made another run on the mansion.

"I hadn't the heart to make the wheels roar and the floor tremble while you were away."

She felt the floor tremble as he crossed the room, sat on the edge of her bed.

She scrabbled to her feet as the floor was still trembling.

He felt the floor tremble as someone solid came up the stairs.

As if to emphasize her words, the floor trembled slightly under them.

Even the floor was trembling, and a picture dropped off the wall.

Didn't you feel the floor tremble while you were reading to him?

Thomas listened while sensing that the floor was trembling under his feet.

The floor of the station trembled under his feet, growing stronger.