On the far side of the room there was a nervous titter of laughter.

It hit Paul Burlson on the head, and a nervous titter ran through the crowd.

A nervous titter ran through the audience, but that was all right.

There was a nervous titter or two in the audience, and Fredda nodded thoughtfully.

The initial response was generally nervous titters - "Who is this guy?"

There were some nervous titters amongst those few who hadn't heard the remark before.

A nervous titter broke from her before she drowned it in her punch.

A poor joke, but it touched off nervous titters.

"And fifty," from Jim, with a little nervous titter.

A nervous titter went through the church, and I looked at the incoming number.