Apparently the question took Mac by surprise, because there was a rather lengthy pause.
When East put in the ten, there was a lengthy pause.
There was a fairly lengthy pause before Afra came back to her.
There was a lengthy pause while everyone thought about it.
"It appears to be approximately nine o'clock," he said after a lengthy pause.
After a lengthy pause, it was the priest's turn to speak.
There was a lengthy pause before Marc responded to her question.
After a lengthy pause, Jake finally came to a decision.
There was a lengthy pause before she said he had been allowed no choice.
"Well," Cindy finally said, after she couldn't bear the lengthy pause anymore.