That was more horrifying than I expected it to be, partly because of the milky wad of digestive ... *thing* the planarian everted, and partly because of the way the earthworm thrashed about like it was being eaten by a digestive organ that looks like semen.
So that's an an actual organ and not just the chemical effect of digestive enzymes or something? I had no idea that flatworms this large even existed and I am utterly captivated.