I know it's bad form to link to rival sites, but this tutorial is very interesting. I've tried shooting water drops, but reading this it looks like I have been doing it all wrong. I tried in a kitchen where there was ambient light coming through a window, combined with my flash. But Ash seems to use a very low level of flash power close to the subject in a completely darkened room. Has anyone tried this method? It certainly produces some stunning results. Does what he says about the power levels and a darkened room make sense?