[[quoteright:319:[[Film/RaidersOfTheLostArk http://static.tvtropes.org/pmwiki/pub/images/indyswap_4458.jpg]]]]

If you're an Franchise/IndianaJones fan you probably know the scene by heart. After dodging one BoobyTrap after another on their way through the TempleOfDoom, the hero approaches the MacGuffin he's spent the past few hours searching for, neatly resting on a pedestal and seemingly unguarded. It's tempting to grab it, but somehow he knows it's not that easy.

The prize, you see, is resting on a PressurePlate, and removing the payload would most likely set off yet another trap. So he ever so carefully swaps it with something of equal weight, and the trap is none the wiser. (Just as often if not more, though, the trick fails and the trap goes off anyways so the audience can see their [[IndyEscape action escape sequence]].)

Like IndyHatRoll and a handful of others, just about every instance of this trope is a ShoutOut to the famed adventurer (see RaidersOfTheLostParody). See also LandMineGoesClick when the "treasure" is a fellow human being.



[[folder: Film ]]
* ''Franchise/IndianaJones'' is, naturally, the TropeMaker. He performs the trick in ''Film/RaidersOfTheLostArk'' (unfortunately the bag proves too heavy after a HopeSpot: the trap goes off, leading directly to ''the'' IndyEscape), and as mentioned above, every other example of this trope seems to be presented and/or interpreted as a reference to it.
* In the ''Indiana Jones'' parody at the beginning of ''Film/{{UHF}}'', George does this, carefully and dramatically weighing the sand bag in his hands before... sighing and just taking the statue (an Oscar). Somehow the trap is still triggered.
* A variation occurs in ''Film/{{Entrapment}}'', in which Catherine Zeta-Jones' character secures a pressure plate with chewed bubble gum before removing the jewelled mask from it.

[[folder: Literature ]]
* In ''Literature/DeltoraQuest'', [[{{The Hero}} Lief]] uses an otherwise worthless ChekhovsGun to fill a hole left by a PlotCoupon. In this case, the problem is size, not weight. [[spoiler:And like many other examples here, it doesn't work.]]
* Shows up in ''If I Pay Thee Not In Gold'' by Creator/PiersAnthony and Creator/MercedesLackey. The catch being that while there's an obvious sensing device of this type, the creators are not stupid and would have known from the start that ''any'' likely thief would be equipped ''on the spot'' to create an exact replica and make the switch, so the thief in question does so - after first filling the area with fog and freezing it to temporarily jam whatever mechanisms are in the pedestal.

[[folder: Live Action TV ]]
* ''Series/{{Highlander}}'' did this in 'The Cross of St. Antoine'. Amanda was trying to help Duncan steal back a cross statue another immortal had wrongly taken. She has to use this technique to prevent the alarm going off when she removes the cross from its display.
* There is an episode of ''Series/{{Andromeda}}'' where the characters have an ''Franchise/IndianaJones''-esque adventure in a jungle planet. Beka steps on such a trap. They consider counterweights, but then Dylan just pushes her away from the poisonous darts.
* Variant attempt on ''Series/{{CSI}}'', in 'Grave Danger'. The glass box Nick was buried in was equipped with explosives designed to go off when pressure was removed from them. Grissom uses a backhoe to dump in a pile of dirt roughly equivalent to Nick's body weight to stop the explosion. It fails, though the dirt does muffle the blast.
* An episode of ''Series/{{Sliders}}'' had a similar example to the above with a booby-trapped hopscotch course. Quinn uses a plank as a see-saw to drop Wade's weight in bricks onto the pressure plate, and they manage to get out of the way just before the trap activates.
* An episode of ''Series/{{Mythbusters}}'' tested the ''Film/{{Entrapment}}'' example of holding the pressure plate down using chewed bubble gum. That didn't work, but trying it with [[DuctTapeForEverything duct tape]] did.
* ''Series/{{NCIS}}'': Tony directly references the TropeMaker when he and Ziva have to rescue a girl on a pressure plate wired with explosives.

[[folder: Tabletop Games ]]
* ''TabletopGame/DungeonsAndDragons'': Dungeon magazine #5, adventure "The Stolen Power". The stolen Book of Infinite Spells is protected by a pressure plate trap. If the Book is lifted off without being replaced by another object of about the same weight (10-15 lbs.), the trap will release KnockoutGas.
** Also in module I4 ''Oasis of the White Palm''. In the Crypt of Badr Al-Mosak, the Star Gem of Shah-pelar is in an area where only part of the floor is real. The rest of the floor is actually acid-filled pits covered with illusions. If the gem is removed from its pillar without replacing it with something of equal weight, the real floor sections will be covered with energy beams that will do serious damage to anyone passing through them.

[[folder: Video Games ]]
* In ''[[VideoGame/SamAndMaxFreelancePolice Sam and Max Hit the Road]]'', Sam uses this trope to steal [[spoiler:Conroy Bumpus's toupee]]. It fails spectacularly, but he gets it anyways.
* In ''VideoGame/MonkeyIsland2LeChucksRevenge'', the way Guybrush replaces a book for another over the bed of Governor Phatt is exactly the same way Indiana Jones replaces a sandbox for an idol in ''Film/RaidersOfTheLostArk''.
* Use of this technique is necessary to acquire one of the Chao eggs in ''VideoGame/SonicAdventure''; it's in a room where the exit locks when the egg is removed, and it needs to be replaced with an egg-shaped rock.
* One of Etsuko's minigames in ''VideoGame/IncredibleCrisis'' involves having to do this with a golden pig, swapping the right amount of groceries in and out of her shopping bag to equal the weight.
* Various pressure plate traps abound in the dungeons of ''VideoGame/TheElderScrollsVSkyrim''. However, a fast player can swap out the treasure with something of equal weight. Whether or not it works depends on how good you are.
* Uncle Mimic of the ''{{VideoGame/Shantae}}'' series tells a story in the second game of how he looted some treasure by ''emptying the contents of his bowels'' onto the pressure plate.
* The player does this in the first ''VideoGame/ResidentEvil1'' game and its remake, thanks to finding imitations of keys and shotguns and such, replacing the original ones from their perches.
* In the ''VideoGame/{{Discworld}}'' game, Rincewind tries to switch his money bag (filled with sand) with a jewel at a temple. As usual with this trope, it fails.
* Edwin Lindsay's chapter in ''VideoGame/EternalDarkness'' features a room with a bronze bracelet guarded by a naga statue. Taking the bracelet causes the doors to close and the naga to spit darts at Lindsay and demand that he ''"Give it back!"''. To progress, Lindsay must replace the bronze bracelet with a worthless iron bracelet discovered earlier. Appropriately, this is very much an Indiana Jones expy chapter.
* Videogame/{{Tyranny}} has a magical variation in the Burning Library, where the Silent Archive is part of a spell that is preventing the whole place from completely crumbling to the Edict of Fire, meaning that in order to get it without the whole placing coming apart you have to replace it with an [[LegendaryWeapon Artifact]] of equal magical power.

[[folder: Western Animation ]]
* A delayed version in ''WesternAnimation/{{Futurama}}'': When Leela rescues the [[BrainInAJar head]] of Creator/LucyLiu from [=KidNappster=].com (which is using her to illegally download copies of her brain into robots) she sets off the PressurePlate sensor, so Leela replaces Liu's head with Madeline Albright's.
* In ''WesternAnimation/PhineasAndFerb'' episode "We Call it Maze", Ferb does this in order to get a key to help through a maze. He even temporarily dons Indie's trademark hat and coat while he does it.
* The ''Daring Do'' book Rainbow Dash reads in ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' features the Indy-Expy heroine making a dramatic show of getting ready for the swap, [[SubvertedTrope only to just take the idol off the platform without bothering to put down a replacement.]]
* In ''WesternAnimation/JackieChanAdventures'', Jackie is shown doing it in a museum to make off with a talisman, while Viper instead uses high-tech to steal a diamond. SatchelSwitcheroo ensues.
* In ''WesternAnimation/BarbieLifeInTheDreamhouse'', Barbie tries this to remove the Dreamhouse's CPU. She grabs a BagOfHolding, pulls a guitar, an anvil, and a lamp out of it, then tries to slide the bag onto the CPU's platform. [[spoiler:The bag proves heavier than the CPU, causing [[IndyEscape a giant Barbie styling head]] to pursue Barbie, Midge, and Summer.]]