First, please read the story, it is not a hard story, can you write your experience?
Narrate a personal experience where you made a serious error. Try like Gawande, in When Doctors Make Mistakes, to incorporate research or advice of others who might help you understand the reasons for your error.
Your journal must be at least 2 page double-spaced, in length to get full-credit. Please make sure to proof-read for grammatical errors.