The child is 14, and whenever she is learning something new she screams and shouts loudly and is sometimes rude to the point of being abusive. This happens in public and private. It happens when learning new academic work and learning new practical skills.
Recently it happened in public, the child was struggling and shouting loudly at the thing they were trying to learn to use, a new skill, effectively shouting abuse at an inanimate object, and when someone approached to offer help and sympathy the child was very rude to them, mimicking them and making personal comments. After the child calms down they are very apologetic and ashamed and talk about trying to manage it differently the next time. Does anyone have insights about what this is about by any chance?