Strange scene in Billy Elliot

In mondays class we were discussing the many weird occurrences that go on in the film. Im not sure if we discussed this one but I noticed that after the scene where Tony and Billy’s ballet teacher fight there is another scene where billy is trying to climb and break through walls to escape from the situation. When he runs up the street he dances into a wall and he sits there for a little bit, then his friend Michael calls his name and there is snow on the ground that wasn’t there a few seconds before and Billy all of a sudden has a winter coat on. I found the sudden change of the weather interesting and can mean many things. This scene of him trying to escape and dancing was kind of long,  it can portray how far from reality dancing actually takes him, or how fast time goes when he is in his escape and doing what he loves?