YOU SAID:
I laughed so hard I broke my lungs.
INTO JAPANESE
私は一生懸命笑ったので肺を壊した。
BACK INTO ENGLISH
I broke my lung because I laughed hard.
INTO JAPANESE
私は一生懸命笑ったので肺を折った。
BACK INTO ENGLISH
I broke my lung because I laughed hard.
You've done this before, haven't you.