Felix looked out across the choppy surface of the rushing, murderous river.

It was bobbing up and down on the choppy surface.

The submarine drove down under the Atlantic waves leaving no mark on the choppy surface.

Beneath the choppy surface of the sea a geological fault line has brought both prosperity and adversity to the city.

Leaves and paper litter swirled across the choppy surface.

The speedboat shot forward across the choppy surface of Lake Michigan.

At other times, there were as many as eight feet between the top of the river wall and the choppy surface of the Tar.

Frank looked back at the dock and saw two metal strands lying slack on the choppy surface!

He searched deeper, trying to pull up more substantial impressions to the choppy surface.

Lightning lit the sky, reflecting off the water's choppy surface.