1, different behavior: crazy criticism of disciples is unorganized, eccentric and even anti-human, while cold and respectful behavior is rigid, correct and abides by words and deeds.
2. Different performances: Crazy apprentices usually have extreme emotional expressions, such as rage, ecstasy and sadness. And the emotional reaction is fierce and easy to get out of control, while the cold teacher is cold, emotionally stable and not easy to get angry.