Correct

一反常态

/ yī fǎncháng tài /
Strokes

Definition

complete change from the normal state (idiom); quite uncharacteristic/entirely outside the norm/out of character

Example

Definition

depart from one's normal behaviour; act out of character; be contrary to one's usual practice

1
fǎnchángtài
一反常态
  
,
duì
shēng
生气
hǎn
大喊
  

He lost his usual equilibrium and yelled at me angrily.

2
Duìfāng
对方
fǎnchángtài
一反常态
  
,
rán
突然
tóng
同意
le
fāng
我方
de
jiàn
建议
  

The other side acted out of character and suddenly agreed to our proposal.