Very interesting image. You've really done a great job of capturing the flames. It might have been more powerful if the firefighter were completely sillhouetted and you might consider cropping out the stuff on the left of the image.
The slit of light makes this shot interesting... it appears to also fall on the fire, which makes me think this is a picture on a wall with someone in front? Either way, real or not, it's still a nice shot with good impact.