Good! Get a clear picture in your mind and write the first sentence you think of. Watch your thoughts, and see what comes into the mind. You know what that bad experience was -- for me, it was so bad I would not even be able to write about it! For your experience, though, think of the emotions involved, the people involved, and then watch your thoughts. Write the first rhythmic and passionate sentence that comes to mind.
This is called an "expository" essay, because you are exposing some truth.
After you write that paragraph, don't make it the first paragraph of the essay. Instead, let it be the second paragraph. Go add an intro later.
Remember to let each para spill out of the topic sentence, so that the whole para is about what the topic sentence is about.
Paragraphs in the middle tell the story, the para at the end reflects on some MEANINGFUL TRUTH, and the para at the beginning grabs the attention and runs with it.
Be brilliant!!
Kevin, EssayForum.com