YOU SAID:

He was so flabbergasted that he killed himself

INTO JAPANESE

彼はひどく驚いたので自殺した

BACK INTO ENGLISH

He was so surprised that he committed suicide

INTO JAPANESE

彼はとても驚いて自殺した

BACK INTO ENGLISH

He was very surprised and committed suicide

INTO JAPANESE

彼は非常に驚いて自殺した

BACK INTO ENGLISH

He was very surprised and committed suicide