knee jerk

Do you think of power suits for men and knee-covering skirts for women?

That his friend had withdrawn, was a pledge of his pacific wishes; and, with a lightened countenance, Louis rose from his knee.

To drop on one knee and level his piece was the work of an instant, but unfortunately he snapped a dry twig in doing so.

Her left knee was supported on pillows, and the bed-clothes were raised away from it, for it could tolerate no weight whatever.

With a low moan her head sunk upon the old man's knee, and she shook and trembled with violent emotion.

As the expression, "every knee shall bow to me," cannot be confined to that alone, so neither can that which immediately follows.