...not sure how this could ever be a 'planned' scene, unless those birds are CGI. But I like to think it's a wonderful example of a cast and crew working intuitively and responsively to any given moment. A process where everyone is in synch. Where the director creates an atmosphere and gives 'permission' for moments for this to occur and develop. I think it's about being open to every moment and ultimately being well and truley 'in the moment'. Which with all the pressures of time and money and in this scene, fading light, I find as a director the absolute hardest thing to be... but moments like the above remind me to keep at the forefront of my mind. Regardless of what I'm expecting, planning or needing from a scene, ultimately the most important thing to happen, is the thing that is happening right there and then.