What Kind Of Mistake (Fiction)

If I were a mistake, what kind of mistake would I be?

I would be the grave mistake. The kind of mistake that is always an accident, but never forgotten. The mistake that is almost impossible to forgive, no matter how much time or thought is dedicated to the matter. The mistake that everyone cringes away from, as if to make it any less real. The mistake that forever scars, emotionally and mentally. The mistake that one cannot stop, once in motion. The mistake that one knows happened the instant they stepped into the room where I am contained.