骇浪惊涛

Explanation: Hack: so scared; Tao: the big wave. Raging waves scary. Analogy dangerous environment or sharp battle. 　　Source: Tang Tian Ying "Jade Sea Yun Lou Hutchison Hall Collection": "people when the only quiet time, thinking, and before each of the shoe by the storm, not a bad idea Tiran." 　　Examples: In no time hairpin, traverse overseas, take the pretty village smoke miasma rain by ~ the risk. (Qing Li Ruzhen "Flowers in the Mirror" The Sixth Round)