"Shake your feet!" "My knees are shaking already.

Isn't that enough ?" returned Hippy as he plunged into the bushes going to Grace's assistance, but there was nothing in his movements to indicate that his knees were shaking.

Hippy Wingate knew no fear, as befitted a man who had fought many winning battles with the Germans high above the earth, but it amused him to convey the impression that he was timid..