Many years ago flying an Arrow III : on finals, about 200 -300ft I pulled 3rd stage of flap. Suddenly, the spring mechanism went twang, the bar went to the floor and I lost all flap. All overcome with a touch of power and slight pitch up.
I've often played about with flap during different phases. A common short field take off technique was to pull 2 stages of flap at 50 knots and bounce her off.
Again, not in the POH but it works.