The players have just left a coastal village in which the inhabitants were "eating OYSTERCATCHERS from the flats". The emphasis is Patrick's.
This is an oystercatcher:
I didn't know this as we were playing, so I described the villagers munching on large chunks of meat, and nibbling at very long bones, because I was thinking of this sort of oyster catcher:
Oops.
There's a concept in role-playing games called "emergent storytelling". The idea is that you don't prepare a plot beforehand, rather you present the characters with a situation, and the "story" emerges through play. I suppose this is an example of that, although I'm not sure what sort of story it's becoming.