There is a system utilized by a few analysts called 'flooding'. This concept believes that if you try to face your fear head on, in a single blow, then your fear system will be overpowered to the point that when you try to calm yourself down, the fear will be no more. Techniques that used throwing the person into the water to make them overcome their fear of the same, are of no use. They only traumatize the person further. One should slowly and carefully work on going to one level of a building and gradually go further on top as they climb a certain level of height.