YOU SAID:

I fell down stairs on a train which was riding a plane which was on top of a bus.

INTO JAPANESE

バスの上に乗っていた飛行機に乗って電車の階段から落ちました。

BACK INTO ENGLISH

I got on a plane that was on top of a bus and fell down the train stairs.

INTO JAPANESE

バスの上に乗っていた飛行機に乗って電車の階段から落ちました。

BACK INTO ENGLISH

I got on a plane that was on top of a bus and fell down the train stairs.