Learn what "i don't know what came over me" means, when people say it, and how to use it naturally in English.

It means the speaker acted strangely or impulsively and cannot fully explain why.
From The Dumb Billionaire Heiress In Love Part Ii, Episode 19
The speaker is apologizing or trying to explain unusual behavior.
Use this after doing something out of character, especially in an apology or awkward explanation. It sounds natural in spoken English but is vague.
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