The muscles of those human arms even tightened a little more.

Under the pressure of her hands, she felt his muscles tighten.

The muscles around her eyes tightened as she caught the edge in his voice.

Felt his muscle tighten and took that as a good sign.

They couldn't've seen more, she told herself again, but her muscles tightened anyway, ready to fight or run.

G-8's muscles tightened and his head seemed about to crack open.

His muscles tightened as he talked about life on the streets.

A muscle in his jaw tightened, and he did not look at her.

A muscle tightened in his jaw, but he did not press the issue.

Pat's muscles tightened, but he held himself still, watching for a chance.