Timing makes the shot alot of the times....natural light, shadows, movement of the subjects, etc....You know this all too well, and you do it beautifully. I don't do this, hardly ever, but I wanted you to see a shot that is amazing. I follow this poster, who is an great artist in his own right, but this photograph he wrote a post about is beautifully timed. Here is the post. Hope you don't mind.