1.   A jay appeared - momentary flash of azure blue wings - to screech and vanish.

2.   And during the occasional aftershock -- or even when a big truck rattles by -- there is that momentary flash of panic.

3.   If microchips were cities, inhabitants would see a virtually constant show of fireworks, with electrons zooming through microscopic roads and throwing out momentary flashes of light.

4.   Those who witnessed the accident described it as a momentary flash of horror, almost soundless in the boisterous celebration.