Sorokin felt his stomach tightening, now that the moment was with him.

Before he had even opened his eyes, he could feel his stomach tightening.

Sarah didn't respond at all, and, the knot in her stomach tightening, Rose left the room.

Cho Hsiang hesitated, his stomach tightening, then shook his head.

Cerryl could feel his stomach tightening, but kept his expression pleasant.

That is a long way down, he thought, stomach tightening.

What set the pulse racing and the stomach tightening - the stake, if you like - until now had been freedom, or the danger of losing it.

I stared at him, my stomach tightening.

He stopped at the door, hesitated, his stomach tightening.

Then, his stomach tightening, he remembered the messenger.