YOU SAID:

I seriously ran with a knife and fell

INTO JAPANESE

真剣にナイフで走って落ちた

BACK INTO ENGLISH

I ran seriously with a knife and fell

INTO JAPANESE

ナイフで真剣に走って落ちた

BACK INTO ENGLISH

I ran seriously with a knife and fell down

INTO JAPANESE

ナイフで真剣に走って落ちた

BACK INTO ENGLISH

I ran seriously with a knife and fell down