Everything was gripped stiff with intensity, and her effort, overcharged, closed in on itself.
She rarely varied from her swinging, forward, intense walk.

Occasionally she ran with Paul down the fields.

Then her eyes blazed naked in a kind of ecstasy that frightened him.

But she was physically afraid.

If she were getting over a stile, she gripped his hands in a little hard anguish, and began to lose her presence of mind.