@tigerdreamer well - in this case it is something that lightroom just "did" for my by clicking one button... but basically what i think it does (and hopefully someone will correct me if i get this wrong) is apply slightly different tones to the dark and light portions of a photo that's been converted to black and white...
@tigerdreamer yes... altho' i think it would have looked metallic with just a straight b/w conversion because of the light and sheen reflecting off the wooden floor...
It's raining up here at the moment and it's making all the snow really wet and gross. Spring here yet?