天有不測風雲 [ㄊㄧㄢ ㄧㄡˇ ㄅㄨˋ ㄘㄜˋ ㄈㄥ ㄩㄣˊ; tian1 you3 bu4 ce4 feng1 yun2] fortune as unpredictable as the weather (idiom); sth unexpected may happen at any moment ◄ ►