Why your 10-year-old yells instead of talking
When your son shuts down or starts yelling, it’s not because he’s being a jerk. It is actually a hardware issue. Boys’ nervous systems are often more reactive to stress and their engines run hot before they have learned how to shift gears. Since the prefrontal cortex, the Sherlock Holmes part of the brain is still under construction, he literally loses access to rational thought when he is overwhelmed.
For many boys, anger is the only masculine gear they feel safe using to hide fear or embarrassment. The move here is to stop demanding an explanation in the heat of the moment because he honestly doesn't have one. Wait for the engine to cool down before you try to look at the blueprint together.