The Metal Krusty-O
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The The Metal Krusty-O is a prize in Krusty-O's.
During a normal breakfast, Bart was eating a box of Krusty-O's. Unknowing that inside there was a jagged metal Krusty-O, or as Krusty claimed, "a prize", Bart ate the piece and later got a stomach ache.
Later at school, he begged his teacher to let him go to the nurse. After a couple dozen seconds or a small nail manicure, Mrs. Krabappel finally excuses Bart. As he entered the office, he noticed something shocking. Instead of their normal nurse, she was replaced with Lunchlady Doris. Bart asks her if she could provide any treatment to his wound, but she tells him all she can do is give him a few vitamins. Bart, knowing neither of the pills would work, collapsed to the ground.
After coming to, he realized he was in the hospital, and noticed the pain had stopped. Dr. Hibbert told him that they had to extract an organ from Bart's body, and looked at his stomach. There were stitches. But also in there were several of his friends (and classmates) visiting him. Bart told him that he got a couple weeks off school, and that eagered the children to ask Dr. Hibbert to get an organ taken out of them. The doctor allowed them, and signed them up.
Bart later receives $500 in health care, and tries to think of something to do with it. Later on, he notices Lisa walking out of Android's Dungeon, and decides to make her happy. He asks Comic Book Guy what Lisa wanted, and he pointed to a record of Bleeding Gums Murphy's song called, "Sax on the Beach". He decides to use the $500 on the record.
Later, Bart shows the record to Lisa, and they hug. Lisa questions where Bart got the $500 afterward.