YMMV / The Simpsons S4 E11 "Homer's Triple Bypass"
Big Lipped Alligator Moment: The Cops: In Springfield subplot is a downplayed version. It's not weird enough to fully qualify (unless you count the opening theme sequence where Chief Wiggum, Eddie, and Lou shoot at a mummy), but it doesn't get mentioned again after the part where Chief Wiggum is in the hospital waiting room after his jaw locked open while trying to eat a sandwich (and that part usually gets cut from syndication for time).
Hilarious in Hindsight: A flashback to Homer's childhood revealed his promising singing career was ruined when his voice changed. In a few episodes in later seasons, such as "Homer's Barbershop Quartet", Homer would go on to have success as an adult singer anyway.