I could tell when she was coming by the sudden startled look on a customer's face.

She cast a sudden look at Jake, who didn't say anything.

A sudden look of terror came to the Captain's face.

I saw a sudden look of horror in her eyes.

A sudden look of surprise crossed the young gentleman's face.

A sudden look of puzzled surprise settled on his face.

She didn't see the sudden look of mischief on her companion's face.

She raised her face quickly, and the sudden look of anguish cut right through me.

"Nothing, I didn't think," he said, with what might be called a sudden look of terror in his eyes.

Then his face changed and he turned to Lev with a sudden look of concern.