Around him his plants whipped back and forth as if being brushed by a large unseen hand.

The long limber torso whipped back and forth too fast to see.

It had a long thin tail that whipped back and forth like a piece of wire.

Their blades whipped back and forth as if they had a life of their own.

The single windshield wiper whipped back and forth in front of him.

It had a heavy buckle which he whipped back and forth.

The bitterness of a life which had never allowed her a chance to consider such questions whipped forth.

His tail whipped back and forth a few times.

They whipped back and forth through the maze of islets.

Its tail slowly whipped back and forth through the air before settling to the floor as well.