A faint grin flickered over his face and was gone.

The very smallest of smiles flickered over the woman's face.

Temper flickered over her face for a moment, then everything relaxed.

A small smile flickered over her face, before disappearing once more.

The frustration at having him pull back flickered over her face.

Something flickered over her face, like a cloud passing across the sun.

Something flickered over her face; surprise, and maybe just a touch of fear.

Something flickered over his face before it became closed and still.

A kind of relief seemed to flicker over the other's dark face.

For the first time a smile flickered over his face.