When Bart's birthday party turns into a disaster, he uses his AM radio gift to play pranks on the townspeople. Eventually he uses it to pretend to be a boy stuck in a well, and the whole town comes to his aid.
Everyone at the powerplant thinks Homer is crazy when he shows up in a pink shirt and want to give him a mental health exam. He has Bart take it for him and ends up in a looney bin with Michael Jackson.
Principle Skinner: Oh, licking envelopes can be fun! All you have to do is make a game of it. Bart: What kind of game? Principle Skinner: Well, for example, you could see how many you could lick in an hour, then try to break that record. Bart: Sounds like a pretty crappy game to me. Principle Skinner: Yes, well... Get started.