YOU SAID:

we should kill somebody, I'm feeling in the mood of killing!

INTO JAPANESE

誰か殺さなきゃ、殺したい気分だよ！

BACK INTO ENGLISH

I have to kill someone, I feel like killing!

INTO JAPANESE

誰かを殺さなければならない、殺したい気分だ！

BACK INTO ENGLISH

I have to kill someone, I feel like killing!