He allowed a faint smile to flit across his face.

At times, a big smile would flit across his face.

A startled look flitted across his face, only for a moment, and then was gone.

A little look of surprise flitted across his face, then.

He saw us, and the most extraordinary look flitted across his face.

Despite himself, a small smile flitted across his face at the memory.

A frown flitted across her face as she considered the situation.

She stood still, and a dark shadow that he could not see flitted across her face.

A savage look flitted across his face and was gone.

For a moment a look of real pleasure flitted across the old man's face, then it faded.