Wow. That pretty much sums up my reaction upon seeing this image.
The technique employed here really appears to be flawless in its execution. I love how the fire is worked. It appears to be in all of the right places and in just the right amounts necessary for the desired effect to be achieved.
Also, the blending of the colors looks great. There is just the right amount of red haze near the fire to make it plausible. Over all, I like very much how the red is only centered around the subject while the remainder of the image is done in darker, dare I say green(ish) tones.