как ни в чём не бывало

as if nothing had happened

→ как
phrase Rare #45,542
as if nothing had happened Used when someone acts completely normally after something surprising, awkward, or serious has happened.
RU: После ссоры он как ни в чём не бывало позвонил мне вечером.
EN: After the argument, he called me that evening as if nothing had happened.

Том как ни в чём не бывало снова заснул.

Tom fell asleep again as if nothing had happened.

Ты вёл себя как ни в чём не бывало.

You acted as if nothing had happened.