How disappointing that this didn't come out better. I had no reason to expect that the head would become a featureless white thing.
I thought it was bright enough. I was wrong. Sigh.
Anyway, it was sprawled on the sand, looking dead. I set it on this surface, where it held on and could rear back when I touched its antenna. Came back through later and it at least wasn't sitting there anymore. Whether it was in the portion of the universe that is Outside of Stomachs or the portion that is Inside Stomachs, I don't know.