一反常态

tā yī fǎn cháng tài duì wǒ shēng qì de dà hǎn

她一反常态，对我生气地大喊。

She lost his usual equilibrium and yelled at me angrily.

tā yī fǎn cháng tài chéng gōng gòng qì chē shàng bān le

他一反常态乘公共汽车上班了。

Departing from his usual routine, he took the bus to work.