The final abandoned chalkboard joke is perhaps the most bizarre out of context. In the January 2014 episode “Married to the Blob,” Bart writes, “Judas Priest is not death metal” on the board. If this doesn’t seem like a joke, that’s because it’s not; it’s an actual act of contrition, a cheeky apology via the show’s animated avatar. The week before, a star-studded episode featured Paul Rudd, Channing Tatum, Seth Rogen, and Leslie Mann, but it also included a guest appearance by Judas Priest frontman Rob Halford. The show mistakenly called Judas Priest “death metal” several times, a writing choice that drew the ire of some surprisingly angry fans.

“I don’t care if you want to have fun at metal’s expense,” Stereogum’s Michael Nelson, one of several music writers who weighed in, wrote (according to The Guardian), “but if you brazenly mix up black metal and death metal — and the essence of the joke hinges on getting that reference right — well, that’s just lazy writing and it deserves to be called out and mocked relentlessly.” While “The Simpsons” has generated some serious controversies over the years, this is one instance where the reaction to the episode is funnier than the under-baked joke itself. At any rate, Bart only wrote the apology the first time the episode aired, with subsequent reruns replacing it with yet another call to (relatively mild) chaos: “If you haven’t broken your Christmas presents yet, you’re not trying.” Classic.