As though she did not know which foot to put first, Frou-Frou started, dragging at the reins with her long neck, and as though she were on springs, shaking her rider from side to side.

Cord quickened his step, following him.

The excited mare, trying to shake off her rider first on one side and then the other, pulled at the reins, and Vronsky tried in vain with voice and hand to soothe her.