"Barting Over" is the eleventh episode of the fourteenth season. It first aired on February 16, 2003. This episode features Bart moving out and living on his own after an argument with Homer over an advertisement he starred in as a child. Tony Hawk guest stars as himself.
When Bart discovers he was the star of an ad when he was a baby and Homer took all the money, Bart is enraged and orders an emancipation. He stays in a loft where he meets skateboarding legend Tony Hawk.
During spring cleaning Bart finds a box of old VHS tapes, one of which was titled "Marge and Homer get dirty". Thinking it to be a sex tape of their parents, Bart and Lisa watch it just to find that it was just them carving pumpkins for Halloween. Lisa reaches into the box and pulls out a tape that says "Bart sad". She puts it in the VHS and hits play. To their surprise it was a video of an old TV ad where Bart acts as "Baby Stink Breath" in a baby mouthwash commercial. They both gasp and Lisa fills in on the title where an apostrophe used to be making it "Bart's Ad" not Bart Sad. Furious, Bart demands to know how they could make him baby stink breath and never tell him. Homer responds, "I was going to tell you on my deathbed." Marge tries to lighten his spirit by saying that he had a lot of fun making the commercials, but mistakenly mentions that he made a lot of money from it. Bart asks where the money went and Homer tells him it was used to buy back incriminating photos of Homer dropping Bart from a balcony. Bart tries to strangle Homer and Marge jumps in surprise. Homer laughs and obnoxiously says that his hands can't even fit around his neck just before Bart pulls out Homer’s belt and strangles him with that. Marge pulls him off and scolds him for attacking Homer. Bart angrily tells Marge that he's sick of Homer's treatment of him, to which Homer brutally responds that he can do whatever he wants to Bart until he's 18 and that when he's 17 he plans to work him like a dog. Angry, Bart tells Milhouse about what happened and says he wished that there was a way to get back at Homer for mistreating him. Milhouse tells Bart that his mom usually uses her lawyer to get back at his dad. So Bart goes to see the Blue-haired lawyer to fill out his testimony. The next day, the lawyer serves Homer with a subpoena and includes a side of bacon in order to get Homer to open the door. Marge is surprised that Bart was suing them. He told her that she had done nothing wrong but he was done dealing with Homer. Homer said that his dad was bad but he never sued him and just dumped him in the worst place he could find.
At the trial, the lawyer makes a case that Homer swindled Bart and has clear anger management issues, which is proven when Homer shakes his fist at everyone in the courtroom. He tries to deny the fact that he has clear anger management problems but failed because of the stenographer taking notes of everything he had said. Homer says "Why you little" at everyone in the room and it shows that Judge Harm had been drawing a picture of Homer hanging from a tree. At the verdict Homer tries to be nice to Bart and when the Judge said that no other judge would send ten-year-olds out on their own, Homer cheers and takes back everything he said. Unfortunately, he spoke too soon because the judge continued, “Except in this case!” She said, "That boy's as safe living with you as a crawdad in a gumbo shack." She grants Bart his testimony. She further orders Homer to give Bart half of his wages until Bart is paid back all the money Homer stole. Homer rushes the bench and gets knocked out by a bailiff.
The next day Bart leaves the house and moves into a loft downtown. He soon finds that Tony Hawk is living in the building and throwing a party with Blink-182. He and Hawk become friends, and Bart is content with his new life. Back at the Simpson house, Marge convinces Homer to apologize to Bart, and the family goes to meet him at his loft. Homer apologizes and requests Bart come home. Bart accepts the apology, but tells them that he is going on Tony Hawk's Skewed Tour.
At the event, Homer meets up with Hawk and pleads with him to pretend to lose to him so that he can make Bart proud of him again. Tony reluctantly agrees and gives Homer a modified skateboard, which does all the stunt work (Homer has Tony lift him onto the board, the only thing Homer would have to have done himself). Later, Homer challenges Tony to a skateboard match and does a good job, thanks to the skateboard. Tony, unhappy about being showed up by Homer, decides to "take out the thrash". They duel with their skateboards in mid-air, and Tony falls to the ground. Homer speaks to Bart and asks him to come home. Bart says that Homer still doesn't understand that this wasn't about him seeing his father as uncool; he left because he was tired of Homer not caring how he felt. Homer still doesn't get it but after a few words of wisdom in skater lingo from Tony, Homer finally understands; he promises Bart that he will never ill-treat him again. Lindsey Naegle approaches Homer and asks him to star in a commercial. Homer accepts so that he can get Bart fully repaid. Now Homer is embarrassed when he watched the final product, an ad for an impotence drug, but Bart told him that nobody will remember after fifty years. Fifty years later, Homer is dead, his tombstone has the phrase "impotency spokesman" on it, and an older Nelson Muntz laughs at his grave.