1.   After a momentary silence, the President spoke again.

2.   But Sam, taking advantage of the momentary silence, leaped between them and grabbed a hand of each.

3.   There was a momentary silence as she averted her gaze again, and she was aware of him picking up his coffee-cup and drinking.

4.   There was a momentary silence.

5.   There was a momentary silence during which she could imagine him rallying for another attack.

6.   The announcement came as a shock to just about everyone in the star-studded audience here whose momentary stunned silence was followed by loud applause.