How can I write a thesis about a car accident???


"On Saturday evening I was sitting on my couch reading a book. Suddenly I heard sirens and I was obviously curious to see what was going on. I got up to look out my window so I could see what was happening. I got there just in time to see everything that happened, it was really crazy. I walked back to my couch so I could continue to read my book but right when I sat down, there was a knock at my door. It was a police officer asking me if I saw what happened. "


This is my story so far, how can I add a thesis to this?? (Its about a car accident for my english class)