Once, when I worked in a lab, someone poured bleach-fix replenisher into the developer replenishment tank by mistake. (No, it was not me. I was still working there the next week.) As the bleach-fix was killing the developer, this is what the images looked like. Perhaps Cricket or someone else made a similar mistake.
On a similar note, the people who owned the lab I worked for told stories about how another local lab used to "spike" the chemistry of competing labs. They would send someone to another lab with a few rolls of film that had been bathed in bleach-fix, dried, and then rolled back into the film canister. When the rolls were processed the bleach-fix would kill the developer and ruin all the film that was processed in it, thus making some pretty angry customers. Very Mean!
Kevin