So, I've been pondering this for a while. In one of the books, Pohatu (I believe) uses his mask of Speed to increase the motion of his molecules (atoms?) to a point where they're vibrating so rapidly that he can pass through solid objects. This made me wonder if the powers of the other Great Kanohi could be used in similar improvisational fashions. For example, could the Pakari (strength) be used to strengthen specific parts of the body, such as the legs for running? Or, could the Kaukau be utilized to breath in liquids other than water, or be used as a "gas mask" to filter the user's air intake. Improvisation probably wouldn't work so well for all masks. Nokama's is a mask of translation, and you can't do much more on that level. Just a thought.