YOU SAID:

when the goose fell i pizza

INTO JAPANESE

ガチョウが落ちたとき私はピザ

BACK INTO ENGLISH

When the goose fell I was pizza

INTO JAPANESE

ガチョウが落ちたとき、私はピザでした

BACK INTO ENGLISH

I was a pizza when the goose fell

INTO JAPANESE

ガチョウが落ちたとき、私はピザだった

BACK INTO ENGLISH

I was a pizza when the goose fell