Outspoken super-animator John Kricfalusi was fired from his own show, The Ren & Stimpy Show, back in 1992. Since then, his television projects have been short-lived: The Ripping Friends lasted 13 episodes on the air, while Ren & Stimpy "Adult Party Cartoon" lasted a mere 3.
Last Sunday, The Simpsons aired a couch gag "guest-animated" by the K-man himself. And about two days later, rumors of the show's cancellation began swarming after The Daily Beast reported on tense cast negotiations. We are still waiting to hear if this season will be the last.
Now, I'm not saying that John K. is cursed, and his mere presence will doom every TV show he comes in contact with. But it IS a weird coincidence. I'm just saying.