I have seen such combats quite often, and have started trying for them, too. My absolute best was a warrior attacking at 0.0% odds displayed and winning without a scratch
Yes, it is unusual to unlikely combats go only one way, with no scratch, but it does happen surprisingly often.
Robi D: I used to take screenies. I dumped them when I had about 20 of >99.9% fights that I lost, about 1/3 of them with no scratch.