By this time in the show's history, there had been an "ever-present fear that as the show ages it risks 'jumping the shark. The Simpsons writers satirized the term's namesake (an episode of Happy Days in which Fonzie jumps over a shark on water skis) in the episode, which has a couch gag where the Simpson family jump over a tank full of sharks in a similar fashion (the gag had previously been used in the episode "How I Spent My Strummer Vacation"). Executive producer Al Jean said, "We figured that if we said it first, then they couldn't say it". The writers included a line where Carl Carlson mentions his Icelandic heritage, as well as the fact that Homer, Moe and Lenny show absolutely no interest in what he's saying. This would later become both the basis and an explicit reference point in the episode The Saga of Carl, where Carl rips off the winnings from a lottery ticket he jointly purchased with the gang before returning to Iceland, and telling them when they track him down that he did steal the money and isn't sorry because they're not friends, as "friends care that their friends are from Iceland!"