YOU SAID:
I want to slap you in the face with a fish
INTO JAPANESE
魚であなたの顔を殴りたい
BACK INTO ENGLISH
I want to hit you in the face with a fish
INTO JAPANESE
魚で顔を殴りたい
BACK INTO ENGLISH
I want to hit you in the face with a fish
That didn't even make that much sense in English.