Creative Mistakes

I just want to talk for a moment about making mistakes that you think will ruin how a photo has turned out, but then loving the outcome in the end. In my last photograph posted was the first time with my lens filters (adjusting UV and such). I had not screwed on on tight enough, thus creating the almost fish-eye look, without any actual distortion of the photo. I was irritated you could see the lens ring at the time, but later found it gave an interesting look to a static photo.

Have you ever had something happen that changed how you imagined your photograph would come out? Any happy mistakes, or just plain wrong ones? I feel I am open to these mistakes, and willing to see if I can make them work! I would love to know your thoughts.