She was falling behind, and a flash of anxiety crossed her face.

A flash of pain crossed his face, and she could have kicked herself for being so callous.

A flash of annoyance crossed the child's face, but she nodded.

For the first time he saw a flash of panic cross her face, then quickly vanish.

A flash of anguish crossed her face, and I realized with surprise that she was going to be alone.

A flash of something, maybe anger, crossed his face and was gone like a ripple lost in dark water.

She was watching him closely, and saw a brief flash of hideous joy cross his face.

She nodded, and a flash of hatred crossed her face.

A flash of irritation crossed his face, then he nodded.

The man was blinking, swallowing hard as a flash of recognition crossed his face.