YOU SAID:

After he sat down he shat himself

INTO JAPANESE

彼は座った後、自分自身をシャットアウトしました

BACK INTO ENGLISH

He sat down and then shut himself out

INTO JAPANESE

彼は座ってから閉め出した

BACK INTO ENGLISH

he sat down and then locked out

INTO JAPANESE

彼は座ってから締め出された

BACK INTO ENGLISH

he was locked out after sitting down

INTO JAPANESE

彼は座った後締め出された

BACK INTO ENGLISH

he was locked out after sitting down