YOU SAID:
The gasious fumes that came from my rump are quite smelly
INTO JAPANESE
私のお尻から来たガス状の煙はかなり臭いです
BACK INTO ENGLISH
Gaseous smoke coming from my butt is pretty smelly
INTO JAPANESE
私のお尻から来るガス状の煙はかなり臭いです
BACK INTO ENGLISH
Gaseous smoke coming from my butt is pretty smelly
That didn't even make that much sense in English.