YOU SAID:

What goes up, must come down!

INTO JAPANESE

何が起こった、下に来なければならない！

BACK INTO ENGLISH

What has happened, must come down!

INTO JAPANESE

何が起こったのだろう、下に来なければならない！

BACK INTO ENGLISH

I wonder what happened, I have to come down!

INTO JAPANESE

何が起こったのだろう、私は降りなければならない！

BACK INTO ENGLISH

I wonder what happened, I have to get off!

INTO JAPANESE

何が起こったのだろうか、私は降りなければならない！

BACK INTO ENGLISH

I wonder what happened, I have to get off!