When invited to be a voice for this episode, Werner Herzog was unaware that 'The Simpsons' is a television show. "I was very surprised when they approached me because I thought The Simpsons was a newspaper cartoon. So when they called, I said, 'Do a voice? I don't understand, it's a TV program?' They thought I was joking," he continues, chuckling, "but I was not."
The last time a Simpson's eye sticks out was in "Lard of the Dance". Here, Bart is impressed about the family having its own 'monster' when both of Abe's eyes protrude right out of their sockets although it grossed him out when Homer's eye bulge out while it was still in its socket.