A scene with Billy and a local girl walking together the girl is dragging a stick along the metal rails of a wall then the rail ends and the girl continues to drag her stick but is now dragging it across the shields of the riot police which I think is a great visual impression of the extraordinary events that are occurring yet has become normal to the children creating a great contrast and visual contradiction.
Another interesting technique to notice is at the end of this scene, Billy takes his leave of the girl and crosses the road leaving the girl standing on the other side a police van passes between them and once passed the girl is gone. I see it as a visual metaphor for Billy moving away from the current life that he is currently living and perhaps his limited childhood.
Another interesting technique was a cut between Billy seen from a square design through a window of a bus as he leaves to start his new life as a student at White Lodge to a cut of a view of Billy’s father and brother seen in a very similar composition through the window of a tube train as they arrive at Covent Garden to see their grown up Billy perform for a male dance version of Swan Lake.
I also liked the beginning with the Billy Elliot jumping on the bed to the sound of T-Rex and the background wallpaper of yellow flowers which are in his bedroom as the shot alters to a reality shot for the opening of the first scene. We then have a similar cut at the end of the movie as the grown-up Billy leaps for his opening performance of Swan Lake to cut back to the child Billy jumping to the sound of T-Rex from the same shot used for the opening credits.
This is one of those great films that you can watch again and again and for anyone interested in film-making this has lots of techniques worth seeing.