YOU SAID:

As he marched down the long flesh hallway

INTO JAPANESE

彼は長い肉の廊下を歩きながら

BACK INTO ENGLISH

He walks in a long meat corridor

INTO JAPANESE

彼は長い肉の廊下を歩いています

BACK INTO ENGLISH

He is walking in a long meat corridor

INTO JAPANESE

彼は長い肉の廊下を歩いています

BACK INTO ENGLISH

He is walking in a long meat corridor