YOU SAID:
何やってんだろう。
INTO JAPANESE
何やってんだろう。
BACK INTO ENGLISH
What are you doing?
INTO JAPANESE
なにをしているの?
BACK INTO ENGLISH
What are you doing, man?
INTO JAPANESE
なにをしているの?
BACK INTO ENGLISH
What are you doing, man?
That didn't even make that much sense in English.