He started softly at first, and then began growing in volume. Over and over and over. It wasn't like he was saying, "Oh God!" More like just intoning the name of the primordial creator as if it was a mantra, rolling the word around in his mouth slowly and repeatedly, like it was a marble or a malted ball.
I think it is important for parents to understand it is not only the learning disability that causes problems but also the anxiety and paralysis that compounds the learning disability. Acting defiant may be a way of protecting oneself from the fear of failure, and it is good if parents can recognize those signs in their children.