Technically any trapping is fair game to move to any other skill, as long as you can justify it. However just because it is technically allowable doesn't mean it's balanced or sensible. These are all home brews, so it isn't like there's going to be an authoritative answer. If you want to allow vanilla mortals to parry bullets and blasts of fire that's fine, but I would find that both overpowered and out of genre (barring some sort of supernatural Kensai type character, which would be out of the realm of Stunts altogether). My example is what I would allow in my game, your mileage may vary.