Irisis followed, but even from the door she could see that the needle was jerking back and forth.

He watched it as the carriage of the machine jerked back and forth.

The Shadow's body jerked dizzily back and forth over empty space.

He glanced from one to the other, his head jerking back and forth in an effort to follow the conversation.

The "Z" jerked back and forth, pointed to the plain.

Still translucent, he jerked back and forth trying to break the power that held him.

He jerked forth a grin and continued through the silence that had fallen on all three.

The gun jerked back and forth in this double grip.

Joog's head jerked back and forth with each enormous stride.

I could see his head jerking back and forth in his car.