兔起鶻落（兔起鶻落）　

◎ 兔起鶻落 tùqǐ-húluò

[quick flow of writer‘s thoughts and imagination;as the moment a hare is flushed out the falcon swoops down] 兔一起動,鶻就撲落下來。比喻動作迅速。亦比喻作畫、書法、作文等下筆快、無停頓