杯弓蛇影
晋朝有个叫乐广的人，爱喝酒。
一天，他邀请朋友到家中来对斟对饮。
忽然，朋友看见酒杯里有条蛇影在游动。
他受了惊吓，回去便一病不起。
请医服药，都无起色。
乐广跑来看他，问明起病的缘由。
乐广听后一把拉起朋友往家走。
他让朋友坐在原处，斟满酒问：“有蛇影吗？”
杯子裡还有“蛇影”！乐广随手取下牆上的弓。
这次，“蛇影”不见了！
“杯子裡原来是弓影呀！”朋友的病情顿时好了！
a false alarm
In Jin Dynasty there was a man named Yue Guang who was fond of drinking alcohol.
One day, he invited a friend to his house to drink together.
Suddenly, his friend saw the reflection of a snack swimming in the goblet.
He got so much frightened that he took ill in bed after getting home.
And neither any doctor or any medicine could cure his illness.
Yue Guang came to see him and asked about the cause of his disease.
When he got to know the cause, he pulled his friend from the bed immediately and took him to his house.
Yue Guang made his friend sit where he used to, pouring a goblet of alcohol for him, and asked him," Is there any snake reflection in the goblet?"
There was still a "snake reflection" in the goblet! Yue casually took away the bow hanging on the wall.
This time, the "snake reflection" disappeared.