从天而降

Explanation: Drop: drop. Metaphor for an accident, suddenly. 　　Usage: Partial official; as the predicate attribute; describe the sudden unexpected 　　Source: Han Ban Gu "Han Having submitted Biography": "Straight into the arsenal, hit sounding drum. Princes heard of it, that the generals are also down from the heavens." 　　Examples: Brother, you really ~ too! I beg for help to save million. (Ming Wu Cheng-en, "Journey to the West" thirty-back) Thesaurus:  be taken by surprise, Down from the heavens, arise suddenly, impossible to defend effectively, dignity lose one's head Antonym Group:  As expected, really, really, Guo Ranruci, sure enough