17. "The Bart Zone" (Treehouse Of Horror II, 1991)
In this send-off of the classic Billy Mumy-starring Twilight Zone episode "It’s A Good Life," Bart is gifted with omnipotent powers that basically give him complete control over Springfield. Bart forces Krusty the Clown to be on TV for 346 straight hours, and when people don’t smile for him, he transforms them into hideous creatures. This is expertly illustrated when Homer refuses to turn off the football game he's watching and Bart transforms him into the ball itself as it sails into the field goal uprights.
The episode’s most memorable moment takes place when Bart turns Homer into a giant jack-in-the-the-box after Homer tries to put an end to his reign of terror.