The red light from the alert was flickering across his face.

For the first time a smile flickered across his face.

A faint smile flickered across his face and was gone.

For the first time the doctor's eyes flickered across Carl's face.

A smile flickered across his face, and then he died.

An expression I did not understand flickered across his face.

Then she allowed worry to flicker across her face once more.

Awareness flickered across his face, first a question, then wonder.

Something that might have been a smile flickered across his face.

A thin smile flickered across his face, then was gone.