Dhugal's jaw tightened visibly, the sun-amber eyes scared and a little desperate.

Her nipples visibly tightened even more at his words, the stiff peaks stabbing out for attention.

It seemed as if her coiled hair visibly tightened around her head.

The Doctor paused, visibly tightening his grip on the mallet.

Despite his social training, Lucien's grin visibly tightened.

Sandy tightened visibly.

This time, Krause's jaw visibly tightened.

Blake's face tightened visibly.

The muscles around his jaw visibly tightened.

The hand on Galina's shoulder tightened visibly.