Until he got a good look at the expression on her face.

He took one look at my expression and knew we had a problem.

Jim looked at the expression on her face and away again, quickly.

I very nearly laughed at the expression on her face.

At the expression on his face, she began to laugh.

She'd have laughed at the expression on his face, if she hadn't known that would make him turn against her.

Looking up, she laughed again at the expression on the Doctor's face.

He looked at the strained, set expression on the President's face.

He was quite frightened at the expression in her blue eyes.

She closed her eyes, suddenly unable to look at the expression on his face.