YOU SAID:
So a guy walks into a bar and asks why is there a duck on your head and then the other man replies because I'm going to eat it!
INTO JAPANESE
だから男のバーに歩くし、あなたの頭にアヒルがある理由を尋ねるし、他の男がそれを食べることを応答するし!
BACK INTO ENGLISH
And so responds to walk into the bar man asks why duck your head and the other guy eat it!
it is unlikely that this phrase will ever reach equilibrium