I felt my stomach tighten, waiting for the bad news.

She did not look at him, and his stomach tightened.

As it did, he felt his stomach tighten with anxiety.

My stomach tightened as I realized it was far less than what we had agreed upon.

Her stomach tightened, and she had to swallow several times.

Instead of sitting, however, he moved toward Julie and she felt her stomach tighten.

This was the part of the job that made his stomach tighten.

My stomach tightened as I waited for her to ask me what had really happened.

Then, as she saw who it was, her stomach tightened.

My stomach tightened as I looked at her empty corner.