YOU SAID:

You never knew until it hit you in the face

INTO JAPANESE

顔に当たるまで知らなかった

BACK INTO ENGLISH

I didn't know it until it hit me in the face.

INTO JAPANESE

私はそれが私の顔に当たるまでそれを知りませんでした。

BACK INTO ENGLISH

I didn't know it until it hit me in the face.