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.