It's been quite cold here today (about -20 Celsius right now). When I came home from work, I noticed the window in the den was full of frost patterns. I managed to grab a dozen or so shots before the light faded to much. Not the sharpest of images because I didn't have time to go with tripod and MLU, but some weren’t too bad. Here's one example, converted to black and white using Desaturate in Photoshop:
What do you think? Is it a little heavy on the contrast?