This is a great action shot and amazing b/w to boot. I really like the soft lighting around the hat, arm/shoulder and leg. I wish that there was some cushion space in front of the rider but other than that it's an excellent photo.
returning for comments
A very nice action image taken at a critical subject angle. You should consider using the 740 limit to enhance the clarity of your effort. On my second round I bumped this image to 6.
Nice shot! The only suggestions I have for slight improvement are a tighter crop on both the left and right sides, and if your camera allows it, a shallower depth of field.
This is a great action shot. A little small, and a maybe cropped a bit tight on the top. This could have been really great if it had been a little bigger. 8.
Great stopped motion. I like it how it shows the speed and strength of the horse and the control and commitment of the girl. The light from behind outlines the bodies. Exposure and toning is great.
I love the frenetic feel to this shot and I particularly like the backlight on the hair with the background in shadow. A litlle more "looking room" in the crop would be nice.