After a few uncomfortably silent moments, he sighed heavily.

This meant that for long periods they were uncomfortably silent because they could think of nothing to say.

The theater is uncomfortably silent for a long moment.

For once he didn't say anything, just sat there uncomfortably silent, and I realized that this was a stupid way to commence a conversation.

Others, though, stand by, uncomfortably silent through the song.

For some reason, they all fall uncomfortably silent when I respond, "Are you paying for it?"

When I finished, the team was uncomfortably silent.

While we waited, the captain was uncomfortably silent.

The room goes uncomfortably silent and somebody tries to change the subject.

The room had fallen uncomfortably silent except for the tinkling of the fountains.