Um, no. There aren't supposed to be any fishers in Nebraska.
I once had a fisher run over my foot while I was hiking a trail in Maine. It's an experience that I had while I was working, but it happened in an instant and I didn't have a camera.
Fishers are unusual to observe, but they occur in Maine so there was nothing all that unusual about my experience.
What if, however, instead of a fisher I was sure I had seen an ocelot? Now that would be unprecedented but still technically possible as ocelots exist. No matter how sure I was of that sighting, I would have to be open to the fact that I was simply mistaken, i.e., that my memory is not some kind of digital recorder of the things that occur before my eyes. At some point on a scale of unlikelihood, I would be confronted with this: the probability that I had been wrong was greater than the probability that I had been right. In other words, it matters not how sure I am about something I recall. If that something is a really unusual event, I must remain open to the fact that I was simply wrong.