He felt his knees grow weak, and the day darkened around him.

M'Benga took his hand and almost felt her knees grow weak at the smile, the touch, the voice.

All knees and elbows, like a colt that grew too fast.

All at once, her knees grew weak and sweat rolled into her eyes.

Michelle felt her own knees shaking with anxiety now, as the moment to act grew ever nearer.

My knees grew loose as the grass bent toward me from all sides.

His knees grew weak, and he had to sit down.

When Elena's knees grew weak, he sat her on the bed.

His knees grew weak, waiting for them to raise the rope.

I felt my knees grow limp at the back and the blood rush up my spine.