疾风骤雨

Explanation: Illness: fast sucker punched; sudden: sudden and violent. Meng described the oncoming storm. Analogy rapid fierce struggle. 　　Source: "Huainanzi Binglue training": "What is hidden the day? Large Hanshen summer, high winds heavy rain, fog dark underworld, who therefore have to change." 　　Examples: A dozen women, one foot thick big hands, bare arm strike with fists boxing, such as ~ came. (Ming Feng Meng, "Awaken the common saying" Volume XIV)