YOU SAID:
I farted on the couch.
INTO JAPANESE
私はソファの上におなら。
BACK INTO ENGLISH
I was on the couch fart.
INTO JAPANESE
ソファおならだった
BACK INTO ENGLISH
It was couch fart
INTO JAPANESE
ソファおならだった
BACK INTO ENGLISH
It was couch fart
That didn't even make that much sense in English.