“I’m reminded of a somewhat tasteless joke about loose tongues.” (MAG 14) Context: After the statement of Lee Rentoul (‘Piecemeal’), where he lost body parts (the jigsaw lady one). He got a tongue in the mail and that’s how he knows he’s going to lose his tongue next. Then he got in a fight with Institute staff and is implied to have lost his tongue.

What’s the joke?

Edit: the joke is the word 'tasteless’. That is right up Jon’s alley, self-referential puns so subtle you miss them.

Edit edit: hold on a minute, the way he phrases the joke seems unique. It’s somewhat possible he made that up on the spot.