hm.. tough one, they're interesting ideas
this:
http://www.pbase.com/alexphotos/image/57613643
i think it might have been nice to have the bike as less of a focal point.. in the picture, but maybe making it a smaller element. One thing i've learnt is that you can get so excited about an idea that all the photos end up being the object of interest dead center - try to think about it being a component of the composition, rather than the object of it.
what interest me in the above picture is the idea that you could make more of the background & increase the isolation of the bike - it's unusual colour is a jarring image & that's kind of cool.
for the mask shots - i would like to see shots taken in available light in darkened rooms, perhaps mostly monochromatic. Or old buildings, to kind of heighten a concept of war & abandonment (woah heavy
).
Or you could maybe take the concept more the way you're going, with the mask in totally mundane situations - cooking... ironing.. that kind of thing - perhaps dress more to suggest an iminent threat (military clothing etc)
just some thoughts.. no need to take em seriously!