YOU SAID:

the muffin was stale so when I took a bite, I spit it out and decided to throw it away before driving to the store and buying a new box of bananas.

INTO JAPANESE

マフィンは古くなっていたので、一口食べて吐き出して捨てることにした後、車で店に行って新しいバナナの箱を買いました。

BACK INTO ENGLISH

The muffins were stale, so after taking one bite and spitting them out and deciding to throw them away, I drove to the store and bought a new box of bananas.

INTO JAPANESE

マフィンは古くなっていたので、一口食べて吐き出して捨てることにした後、車で店に行って新しいバナナの箱を買いました。

BACK INTO ENGLISH

The muffins were stale, so after taking one bite and spitting them out and deciding to throw them away, I drove to the store and bought a new box of bananas.