This has been done once by every {{sitcom}} and sitcom-like cartoon since 1952.

AliceAndBob are neighbors, and they hate each other. One day, Alice goes to a government office and finds a city map that shows her property extends well past the fence between them. Alice will begin commandeering anything of Bob's that falls into their property. A tree, a workshed, the TV in his living room, etc.

The episode frequently ends with Bob discovering that the first read it wrong, and what it ''really'' meant was that the property line cuts into Alice's property instead. Insert defeated "wah-wah-waaaah" trombone sounds here.

This is usually {{Snapback}}ed as it never comes up again.

Note that this is a classic example of HollywoodLaw: in reality this kind of discrepancy would (1) immediately lead to a lawsuit, which (2) would almost always be solved by somehow granting Bob the land he thought was his. (The mechanisms here are [[ adverse possession]] if he or his predecessors in interest[[note]]As a quick lesson, suppose adverse possession takes 20 years in Bob's jurisdiction. If it's 2010 now, and Bob inherited the house from his uncle in 2008, and the uncle bought it from some other fellow in 1996, and that other fellow built the house and the fence that extends across the property line in 1989, then all of that counts towards Bob's 20 years of possession, even though he's only been on the property for two years.[[/note]] used the land consistently enough for long enough, and various kinds of easements and forced sales if he hasn't.)

See also ThisIsMySide, which is the same plot in miniature. Compare and contrast with ForeignerForADay.

[[AC: Comic Books]]
* There was once an issue of ''Disney Magazine'' that had this happen to DonaldDuck. He finds a bricked-up doorway in his cellar, behind which is a chest of valuable antique coins. He sells them, and goes on a spending spree, only to have his neighbour come by with a map proving that anything behind the bricked-up door is actually on ''his'' property. All of Donald's fancy new furniture is repossessed, and immediately re-purchased by the neighbour, so Donald has to make do with some old chairs found in the main part of the cellar. [[spoiler: Turns out the chairs are even more valuable than the coins were.]]

[[AC: Film]]
* The Oscar-winning silent 1952 short ''Film/{{Neighbours}}'', directed by Creator/NormanMclaren for the Creator/NationalFilmBoardOfCanada, is a dramatic and disturbing instance. A surreal anti-war parable, it depicts an escalating battle between two homeowners over the ownership of a single flower growing right on their property line. Watch it [[ here]].
* In the classic Polish comedy ''Sami Swoji'' two families end up in a FeudingFamilies situation because a Kargul plowed '3-fingers-width' deep into land claimed by the Pawlaks. The eldest Pawlak son retaliates by hitting the Kargul with a scythe and then flees to America. Decades later the two families need to cooperate to survive the aftermath of World War 2 but the patriarchs still occasionally break the peace when they get into silly property disputes over things like who owns the cat that hunts the rats in their sheds.

[[AC: Literature]]
* OlderThanFeudalism: ''Literature/TheBible'' prohibits moving your neighbor's boundary stone or other property marker, presumably to prevent just such a quarrel taking place.
--> "Remove not the ancient landmark, which thy fathers have set." (Proverbs 22:28)
* Subverted in the famous Creator/{{Robert Frost}} poem, [[ Mending Wall.]] It isn't necessarily about the property line intruding on either person's side of the fence, but rather whether or not a literal stone wall is needed to solidify the property line.

[[AC: Live Action Television]]
%%* ''Series/SanfordAndSon''
* ''Series/MarriedWithChildren'': In one episode, Jefferson D'Arcy takes an apple that fell from the Bundys' tree and Al argues with him over the apple's ownership. It leads the two families into finding out the official boundary between their lands isn't even a straight line. The tree belongs to the D'Arcys. The Bundys further research the map and find out the D'Arcys' barbecue drill is in ''their'' property. The D'Arcys retaliate by setting a toll booth at the Bundys' garage entrance. The Bundys retaliate by reporting an irregular improvement that, since it's done on what turned out to be D'Arcy property, the D'Arcys are fined for it. They eventually decide to make peace but then [[HereWeGoAgain another apple falls off the tree]] and Al and Jefferson fight over it.
* ''Series/{{That 70s Show}}'' - happened exactly like the trope's definition, starting with Bob taking things from Red's garage and ending with Red finding out that he owns part of Bob's house.

[[AC: Music]]
* The Music/BonzoDogBand's song ''My Pink Half Of the Drainpipe'' explores this concept in song.

[[AC: Western Animation]]
* In a second-season episode of ''WesternAnimation/TheFlintstones'', Barney painted a property line through the middle of the room Fred just added to his house (tricking Barney into doing all the work, of course.)
* ''WesternAnimation/{{The Jetsons}}'': This was the central plot point of the episode "Private Property".
* ''WesternAnimation/SpongebobSquarepants'' did this.
* ''WesternAnimation/GoofTroop'', In the episode "Goof Under My Roof" plays it straight, when it looks like Pete owns half of Goofy's house, and he then claims everything in that half as his. At the end, it turns out that Pete doesn't own half of Goofy's property,. but rather Goofy owns half of his.
* A ''WesternAnimation/MightyMouse'' cartoon "The Green Line" featured a town where mice lived on one side of said line, cats on the other. An evil cat spirit tries to get the cats to ignore the line and attack the mice, but Mighty quickly arrives to restore peace.
* One episode of ''WesternAnimation/ThePinkPanther'' ("Pink Panzer") had an unseen narrator building up conflict between the Pink Panther and his neighbor, starting with a couple of borrowed possessions, but then coming into this trope when he, at the narrator's urging, saws off a limb that extends over the line, dropping leaves into his yard. The neighbor retaliates by sawing off part of the Pink Panther's ''house'' that was extending into the space over ''his'' yard. The narrator gets the panther to build a wall, then the neighbor to bring out a unit of artillery, the panther to bring out something bigger, the neighbor to call in some military help... At the end, the narrator is eventually revealed to be [[spoiler:The Devil]].