如梦方醒

Explanation: Just woke up like a dream. Analogy in the past has been confused, in fact, inspired by others or just understand the situation. 　　Source: Ming Feng Meng, "Eastern Zhou Chi," Chung heard Guaren XI back to the statement, a rude awakening. " 　　Examples: Everyone listened to, ~, foes joy. (Qing Chen Chen, "Water Margin after the transfer," the thirty-back)