Very nice photo full of action. Absolutely terrific composition. Vibrant colors. Beautifully stopped motion. Really a very worthy effort. But without the feel of a candid photo of someone unaware of the camera.
Nice shot. Perhaps a closer zoom would have been preferrable so as to see the fear and excitement on the faces of the riders. Still very nice. Well done.
Excellent crop. Quite a dramatic sky which adds to the interest in this photograph. Some haloing around the foreground as a result of your exposure correction (perhaps by masking, or using the shadow&highlights filter?) is distracting enough to be an in issue. Overall well done, though, and timing was perfect.
This is a beautiful image with strong colors, great depth of field and a very interesting subject that is placed perfectly in a leading line on the thirds theory. Even the border is great IMO. The miniscule subjects however force a lack of emotion that is conveyed in the close up or the typical candid. Certainly I can see that there are people who may not have known their picture was being taken, but I am unable to force this image into the category of the challenge. Technically and photographically I would rate this a 9 as it could be upexposed a spot or two to really add some punch. Challenge-wise, I can only give this a 4 as it is a solidly shot/processed image that does not seem to fit in the category of candid.