They were swinging into each other and I saw this opportunity. From the boardwalk — it's actually concrete — I had an elevated view of them. This not only gave a less common and more interesting point of view, but it also eliminated all the distractions that would otherwise have been in the background. I also like that they remain anonymous, and the only thing we know about them is their friendship. The arc in the sand is a stroke of luck (no doubt the result of my good karma). It breaks the chaos of the sand and helps connect the two girls.