He could not have said why, save that the unnatural silence oppressed him.

There was still an uncomfortable, unnatural silence around the room.

Nothing else broke the unnatural, heavy silence of the crew.

Her father's arrival with the coffee broke into the unnatural silence.

A long moment of calm brought an almost unnatural silence to the room.

They watched in a silence unnatural for so many people.

The first thing to strike me was the unnatural silence.

It broke the unnatural silence, and sound spilled around us.

The unnatural silence in the building began to get on his nerves.

And perhaps that was the reason for the unnatural silence all about them.