Though Derec knew better, he felt his whole body tighten reflexively with the fear that they were about to smash into one of the walls.

Marit jumped up, her hand tightening reflexively around the haft of the spear.

"Senator, I think we have a problem," says the campaign manager of your Presidential bid, as your stomach reflexively tightens.

What he saw made his stomach muscles tighten reflexively.

She whimpered at the shameful pleasure and clutched at him, her fingers tightening reflexively in his thick hair.

Faulwell's knuckles tightened reflexively on the edges of his console.

Amaryllis's fingers tightened reflexively on the phone.

His fists tightened reflexively, then he turned on his heel and stormed toward his waiting cab.

His biosynthetic left hand tightened reflexively at the thought.

His arm around her tightened reflexively, drawing her closer without seeming to mean to do so.