be beside yourself 形容（因情绪太强烈而）无法控制自己

be beside yourself

谢耳朵的姐姐跑去告诉谢耳朵，妈妈因为他没有朋友很不开心。

be beside yourself形容（因情绪太强烈而）无法控制自己，后面加上不同的名词就可以形容不同的极致情绪。

He was beside himself with rage when he saw the mess.

他看到一切都乱七八糟就勃然大怒。

She was beside herself with joy when she heard the news.

她听到消息欣喜若狂。