手足无措

Explanation: Measures: placement. I do not know where the hands and feet into the well. Described the panic move, or can not cope. 　　Usage: The main predicate; as predicate, adverbial, complement; containing derogatory 　　Source: Pre-Qin Confucian "Analects, XIII": "the penalty, then people 无所措手足." 　　Examples: Xu Shan "daughter heart": "I heard a couple of military people will be in town during the day, live in the city of Manchu more scared ~." Thesaurus:  at a loss what to do, Wusuocuoshou