“The Boys of Bummer” – Season 18, Episode 18
Bart screws up during a baseball game and for some reason this causes the entire town to turn on him. That’s silly but could work. However, the people of Springfield are so mean and awful to Bart (a 10-year-old kid, remember?) that he eventually snaps and climbs up a water tower. Then, after being egged on by police chief Wiggum, he yells out that he hates himself too, and leaps to his death. He survives, but still, WTF? And all of this is played for laughs.
