I think the image of interest here was about the gradient. There is an image of a stick balanced with a ripple, and on that one, the set up was deliberate but the movement of the water quite lucky, rather like setting up to shoot a flower and having the butterfly arrive.
Communicating Arts - The Journal 
I liked it most! Are the ripples in the water timed or you clicked the camera randomly?
I think the image of interest here was about the gradient. There is an image of a stick balanced with a ripple, and on that one, the set up was deliberate but the movement of the water quite lucky, rather like setting up to shoot a flower and having the butterfly arrive.