He is having a temper tantrum.

他在大发脾气。

youdao

Henry Weston: How can a store throw a temper tantrum?

亨利·韦斯顿：商店怎么还会发脾性啊？

youdao

All-or-nothing (I love you one minute but, in a temper tantrum, I hate you.)

爱走极端我爱你每一分钟；但是在发脾气时，我恨你。

youdao

As I say to my children whenever they throw a temper tantrum: tough noogies.

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More than once was I pulled over by cops because I carried a 2 year old throwing a temper tantrum into a car.

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Keep in mind that because mania is only a word we use to describe certain types of behavior and emotions, there is no clear answer to your question of where mania stops and a temper tantrum begins.

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