[[quoteright:320:[[VideoGame/SpaceQuestIIVohaulsRevenge http://static.tvtropes.org/pmwiki/pub/images/bridge-logic.gif]]]]
[[caption-width-right:320:How convenient.]]

->'''Milo:''' Will you look at the size of this? It's gotta be half a mile high, at least. It must have taken hundred -- no, thousands of years to carve this thing.\\
''(Vinny blows it up so it falls down over a chasm)''\\
'''Vinny''': Hey, look, I made a bridge. It only took me, like, what? Ten seconds? Eleven, tops.
-->-- ''Disney/AtlantisTheLostEmpire''

A tall object, such as a pillar or a tree, is destroyed to make a bridge over a [[BrokenBridge river or chasm]].

[[AcceptableBreaksFromReality Nobody ever wonders]] how remarkable it is that the object just happened to be longer than the chasm's width or placed right next to it.

Not to be confused with FridgeLogic. See also ImprovisedPlatform.



[[folder:Anime and Manga]]
* In the second episode of ''VisualNovel/KoihimeMusou'', Chouhi cuts down a tree that ends up crossing a chasm in order to save some villagers from a group of bandits.
* In the manhwa ''Manhwa/DorothyOfOz'', Mara attempts to blast a tree to cross a river. She overdoes it and the tree turns to dust. She is bemoaning her lack of control when Abee points out that they can skip over the wreckage she created from destroying most of the surrounding landscape.

[[folder:Comic Books]]
* In ''ComicBook/{{Cavewoman}}: Raptorella'', Meriem uses a fallen tree to span a chasm while trying to escape from Raptorella. She is halfway across when Raptorella catches up to her.

[[folder:Films -- Animated]]
* ''Disney/AtlantisTheLostEmpire'', as quoted above.
* In ''WesternAnimation/{{Shrek}}'', Shrek doesn't cut the tree down, but he bends it over a stream so Fiona can cross. Then, while Donkey is trying to cross, Shrek lets go of the tree, [[TreeBuchet with predictable results.]]

[[folder:Films -- Live-Action]]
* In ''Film/SurvivingTheGame'', Mason bridges a ravine with a tree by cutting it ''with a shotgun''.
* ''Film/SkyCaptainAndTheWorldOfTomorrow'' features an enormous tree serving as a bridge over a ravine on Totenkopf's island.
* In ''Film/TheHobbitTheBattleOfTheFiveArmies'', Legolas does this with a small tower by steering a blinded troll into it.
* ''Film/ThorRagnarok''. Hela is trying to enter an Asgardian stronghold protected by a) a deep chasm, and b) enormously tall stone doors (it's from the UnnecessarilyLargeInterior school of architecture). She blows the doors open in such a way that they fall outward, bridging the chasm.

* Early on in ''Castle Death'', Literature/LoneWolf has the option of using his telekinesis to do this (assuming he's picked up [[MindOverMatter Nexus]] by then, anyway).

* In ''Literature/TheWonderfulWizardOfOz'' (1900), the Scarecrow has the Tin Woodman do this by chopping down a tree... and then has him chop it down again, with the pursuing Kalidahs still on it.
* Used by the explorers in ''Literature/TheLostWorld1912'' to reach the mysterious plateau.

[[folder:Live-Action TV]]
* The Marshalls make one in the ''[[Series/LandoftheLost Land of the Lost]]'' season 3 episode "Abominable Snowman" to cross over a canyon, leaving the [[BigfootSasquatchAndYeti Yeti-like beast Tappa]] on the other side.

[[folder:Newspaper Comics]]
* In one ''ComicStrip/FootrotFlats'' strip, the Dog attempts to avoid one of the Murphy's crocopigs by pushing over a tree to allow him to cross the river. However, the dead sapling he pushes over is both far too short to reach the over bank and far too spindly to support his weight.

[[folder:Video Games]]
* In ''VideoGame/{{Bloodborne}}'', one of the tombstones in Nightmare Frontier can be kicked down and have it serve as a bridge.
* In ''VideoGame/DarkSoulsII'', the player may occasionally come across woods you can kick down and have them serve as bridge.
* Taken UpToEleven in ''VideoGame/LittleBigPlanet'', any tall object, be it a ruler, a pencil, a sword, or even dead fish, if not heavy or thick or glued, can be kicked down and serve as makeshift bridges for our Sackboy.
* In ''VideoGame/TheLastofUs'', the player will often encounter gaps between building to building. Conveniently, however, is the fact that in such situations a ladder the exact size of the gap will always be nearby to form a makeshift bridge with.
* Both the first (two trees to make two separate ones) and the last level (a pillar) of ''[[VideoGame/DarkForcesSaga Jedi Academy]]'' have objects destroyed to make bridges, the first two by cutting them with a lightsaber, the second by useing force push. Interestingly, the pillar doesn't just fall down; your push is so powerful the BASE of the pillar is the end of the bridge (and the tip rests at the original base).
* In the GBA ''VideoGame/FireEmblem'' games, old trees can be destroyed to make bridges over water.
* One of the ghosts needs to create an earthquake down a tree in ''VideoGame/GhostMaster''.
* In ''VideoGame/StarWarsRepublicCommando'', the commandos bomb a pillar to reach the unconnected opposite side of a gap.
* In ''VideoGame/QuestForGloryIV'' the player knocks down a statue of an EldritchAbomination to cross a swamp.
** In the third game, the Fighter and the Paladin have to defeat a gargoyle (who then turns back to stone), then use ''that'' to cross the chasm.
** In the SpiritualSuccessor / FanSequel, HeroinesQuest, the Warrior must do this to enter the swamp.
** ''VideoGame/KingsQuest2015'' has this twice in chapter one.
* ''Franchise/TheLegendOfZelda''
** Featured in ''VideoGame/TheLegendOfZeldaOcarinaOfTime's'' Shadow Temple to reach the room before the temple boss.
** ''VideoGame/TheLegendOfZeldaTwilightPrincess'' does this as well. You have to use {{Trick Arrow}}s both times to reach the base on the other side.
** ''VideoGame/TheLegendOfZeldaSkywardSword'' lets you use good old-fashioned bombs to knock over sentry towers and cross chasms.
** ''VideoGame/TheLegendOfZeldaBreathOfTheWild'' lets you use axes to cut trees and create makeshift bridges, but more realistically as it doesn't always work; not only does the tree itself need to be long enough to reach the other side, but it won't work if you cut it blindly, as you need to think about where it's going to land.
* In ''VideoGame/BlueDragon'', the player has to to push over a tree to make a bridge to reach a chest in the Lot Wilderness, and the Elder of Pachess Town uses the Green Device to destroy the base of a rock pillar to make a bridge over a fissure in the Giant Ice Fields.
* The Howling Halls in ''VideoGame/FableII'' have pillars that are conveniently the right height to bridge the spike filled pit blocking the players escape.
* ''VideoGame/TalesSeries''
** Many Sorcerer's Ring-related gimmicks in ''VideoGame/TalesOfHearts'' revolve around knocking down a pillar or tree over a chasm.
** ''VideoGame/TalesOfTheAbyss'' does similar things with Mieu Fire.
** It pops up a couple times in ''VideoGame/TalesOfVesperia'' as well.
** In ''VideoGame/TalesOfPhantasia'', you use the sorceror's ring in a similar manner. Except you down pillars and walk across their widths, not lengths.
* ''VideoGame/GhostHunter'': [[spoiler:Detective Lazarus Jones uses a sniper rifle to blow up a cabin high on a cliff face by a waterfall. The debris falls into the river, floats down and fetches up against rocks in the stream forming a bridge.]]
* ''VideoGame/GuildWars'': In the Nightfall campaign, there is an area in the Desolation where you have to [[spoiler:shoot a boulder with your [[SandWorm Junundu Wurm]]]] at a monolith to knock it down, making a bridge so you can progress. In Prophecies, there's an ancient statue that will topple when you get close, forming a bridge for you.
* Hermes, a sort-of-antagonist in ''VideoGame/TheSuffering'', launches a bus down a ravine that blocks your progress. It's uncertain whether he's deliberately creating a bridge for you, or trying to run you over.
* ''VideoGame/{{Overlord}}'' does this a couple of times.
** To be more precise, you kick down sections of wall from ruined houses. They always have exactly the needed length and never break anywhere except at foot level...
** Even more surprising, they're exactly the right size to fit ''flush'' into the gap, so you walk across them like level ground.
* During ''[[VideoGame/MetroidPrime Metroid Prime Hunters]]'''s story mode, the scan visor actually suggests blasting a piece of ruined architecture, calculating it will make a bridge.
* Happens with a tree trunk that Susano is rafting down the river with in ''VideoGame/{{Okami}}''. Amusingly, this is the only such instance -- with her reality-altering paintbrush, Amaterasu can 'fill' any other BrokenBridge in.
** Played straight, however, in the sequel ''VideoGame/{{Okamiden}}'', where cutting down stalagmites to make bridges is a gameplay mechanic in two areas.
* The second ''VideoGame/TheLegendOfKyrandia'' game has a similar situation: if Zanthia tries walking across the Quicksand Bog, she'll get sucked in and die. However, there's a tree nearby that's just the right height ...
* Justified in ''VideoGame/SuperheroLeagueOfHoboken'', where you have to use a size-amplifying superpower to make a tree grow to the right size before knocking it down and making a dam. (Later you have to return the tree to its original size to ''undo'' the dam.)
* One of the standard Doodads (objects that are neither terrain nor player units, like... trees and bridges) in ''VideoGame/WarcraftIII'' was one of these -- a tree that became a bridge if you attacked it. It also splits down the middle when doing so, for some reason.
* Happened once or twice in ''VideoGame/{{Rayman}} Revolution''.
* One of the things Daxter can do in ''VideoGame/Jak3Wastelander''.
* ''VideoGame/SpaceQuestIIVohaulsRevenge'', pictured above. Slightly subverted, the part of the tree that breaks off would not be long enough to cover the chasm, on a modern display's aspect ratio.
* ''VideoGame/IndianaJonesAndTheFateOfAtlantis'' is an odd example: the tree is long enough, but, to make it a bridge, Indy has to stand on top of the tree. It ''bends under his weight'', working like a TreeBuchet (minus the launching him somewhere else), without the tree breaking.
** And then you discover that [[TookAShortcut there was a shortcut]].
* First level of ''VideoGame/{{Ristar}}'' - you have to headbutt a tree so it falls over.
* In ''[[VideoGame/{{Drakan}} Drakan: Order of the Flame]]'', after getting Arokh's Soul Crystal from Heron's crypt and returning outside, there's an old rotting tree that protagonist Rynn can push to make a makeshift bridge across a gap (and as a bonus, kill an unfortunate orc who's patrolling the other side).
* In ''VideoGame/DarkChronicle'', Max and Monica traverse the sections of [[TheLostWoods Rainbow Butterfly Forest]] by gathering Fairy Saws (the signature keys for that dungeon) to fell large trees (the "gates") so that they form bridges across the streams and rivers.
* Subverted in ''VideoGame/GearsOfWar2''. You DO use a tall, hollow thing to make a bridge, but it gives out half-way.
* In ''VideoGame/DarkSector'' to escape a sinking cruise ship the protagonist at one point has to blow up some crates that float and form a bride over the water.
* In ''VideoGame/ResidentEvil5'', Chris Redfield manages to do this using [[http://www.youtube.com/watch?v=4xuXkVzBdJQ a boulder]]. By punching it several times.
* ''[[VideoGame/RebelAssault Star Wars: Rebel Assault II: The Hidden Empire]]'' has an unusual example of this. While shooting your way through an Imperial base, you come to a chasm with a destroyed bridge and are forced to improvise a way across... ''by shooting the [[ExplodingBarrels supports]] of another bridge above you''. This bridge falls perfectly into place, killing a couple stormtroopers in the process.
* In ''VideoGame/EpicMickey'', one of the ways you can get into Gremlin Village's Colosseum is by knocking over the Leaning Tower of Pisa and the Eiffel Tower to make a bridge.
* ''VideoGame/GoldenSun'' plays with this. There's no instances of actually making a bridge, but there is one tree you knock over to make a platform.
* ''VideoGame/AssassinsCreedII'' and ''[[VideoGame/AssassinsCreedBrotherhood Brotherhood]]''. While not necessarily bridges, architecture always fall off to make steps when in areas like the Romulus lairs to act as a checkpoint and Ezio ALWAYS reminds you how convenient it is to climb back up whenever he falls.
** Throughout [[Franchise/AssassinsCreed the series]], the jumping action itself serves as BridgeLogic, because buildings and other objects are arranged precisely to match the assassin's maximum jumping distance. Although there are plenty of locations where a jump seems almost doable but really isn't, gameplay absolutely depends on you being able to easily find those routes where it's possible to continuously jump across from one place to the next during those ''long'' chases - often without slowing down at all.
* Slightly subverted in ''VideoGame/TheLegendofDragoon'', where the characters actively notice that a tree is an appropriate height, and embark on a miniquest to chop it down and get it to the river.
* ''VideoGame/WorldOfWarcraft'' has a variation in the Ulduar raid. One of the bosses, Kologarn, is a stone giant standing in the middle of a chasm that comes up to his waist. Killing him has his torso break off and form a convenient bridge to the other side.
* In ''VideoGame/WrathOfTheGods'' you have to knock down a tree to cross a chasm.
* The Legend Entertainment adaption of ''[[Literature/HeecheeSaga Frederik Pohl's Gateway]]'' has a puzzle that can be solved in this manner, if you don't want the [[MultipleEndings good ending]] (you're trying to impress an environmentalist, so he'll return with you. Chopping down a tree is the ''opposite'' of that, even if it ''is'' exactly the right length for crossing the chasm you're trying to cross.)
* In ''VideoGame/SpiderManShatteredDimensions'', Amazing Spidey has to get Kraven the Hunter to do this as he's trying to snipe him in one part of his stage.
* The gameplay in ''VideoGame/TinyAndBig'' relies fairly heavily upon these, as Tiny's entire arsenal is designed specifically for manipulation of the game's environment.
* One of the first playable quests in the web-based RPG ''VideoGame/DragonFable'' lampshades and double-subverts this. Your character sees a chasm in a cave and a conveniently-placed stalagmite and thinks to knock it over:
--> '''[[HelloInsertNameHere Your character]]''': This is my best idea ever!
--> *Stalagmite leans toward you*
--> '''[[HelloInsertNameHere Your character]]''': This is my ''worst'' idea ever!
--> *Stalagmite leans the other way, falls, and bridges the chasm*
--> '''[[HelloInsertNameHere Your character]]''': BEST. IDEA. EVER!
* ''Franchise/FinalFantasy''
** ''VideoGame/FinalFantasyXI'' introduced an interesting example in its 5th expansion. When first arriving in a water-filled zone comprised of separate islands the only way to get between islands is to form tree bridges. To do so a powerful group of enemies must be killed at the base of the tree. The resulting bridge only stays for less than an hour before the same tree must be knocked down again.
** ''VideoGame/FinalFantasyXII'' manages to avert this troupe while still forming a bridge by felling trees at a river's edge. A BonusBoss is located on an island that can only be reached by knocking several trees into a river. Rather than a single tree spanning the length currents carry several from various locations in the zone to form a dam of sorts.
* Subob is allowed to bridge gaps for his sleepwalking master to pass through by using literal fish bridges in ''VideoGame/BackToBed''.
* ''VideoGame/MajinAndTheForsakenKingdom'' provided an example at Hawme'a Falls, where there is an upright plank of wood besides the ravine. Not only is its height ''just'' right, but it will fall exactly into place after getting knocked down by Majinís wind spell. Subverted in that it is not a true bridge but only there for a side path.
* In ''VideoGame/JakAndDaxter'' Jak can punch at some dinosaur ribs that are half buried on Misty Island to knock them over and make bridges over the rocks.
* In the ''VideoGame/PokemonRanger'' games, you are occasionally required to get a wild Pokémon to knock over a dead tree or similar object to create a bridge.
* At one point in ''VideoGame/HalfLife1'', you have to call an aerial bombardment in order to break a hole in a wall and then to knock down a communications tower to make a makeshift bridge to said hole.
* ''VideoGame/{{Ico}}'' has you blow up a large pillar to make a bridge.
* Averted in ''VideoGame/TheLastGuardian''. Early on, you knock over a pillar, creating a bridge across the chasm in front of you. A moment later, the pillar slides free and tumbles into the chasm and you're forced to find another way across.
* The first time you visit Rhamu in ''VideoGame/CosmicStarHeroine'', Chahn gets a flamethrower which she uses to topple trees to use as bridges. Dave isn't enthusiastic about that idea, despite Chahn's reassurance.

[[folder:Western Animation]]
* In ''WesternAnimation/RockyAndBullwinkle'', Boris Badenov tries to finish off the title characters by chopping a tree down over a gorge that Rocky and Bullwinkle are traveling under in a makeshift boat. The tree is too long and hits the other side of the gorge.
* Joked about on ''WesternAnimation/InvaderZim''. Rather than using the conveniently-placed tree (even after it was pointed out), he decided to make a bridge out of his ''own teammates'' to cross the chasm.
* ''WesternAnimation/{{ReBoot}}'' has Megabyte do this while in a Military/Dinosaur game when running away from a Tankasauourous Rex (ItMakesSenseInContext). It doesn't help him escape.
* ''WesternAnimation/TheSecretSaturdays'': Drew does this to provide an escape route in "Food of the Giants", although the trunk ultimately ends up sliding into the chasm.
* ''WesternAnimation/TazMania'': In "The Bushrats Must Be Crazy", a lightning bolt drops a conveniently placed tree across a chasm to allow the Bushrats to continue their search for the Great Duck. Subverted immediately afterwards as a second lightning bolt strikes the log while they are halfway across.
* In ''WesternAnimation/WorldOfQuest'', while not over a chasm but a muddy river is used quite cleverly. Through a magic enchantment Quest is forced to obey every command Prince Nestor gives him, but he has freedom over how to do it. When Nestor orders him to make a bridge over the muddy river so the party can walk across, Quest throws Nestor face down in the muck as everyone walks over him.
* In an episode of ''WesternAnimation/AdventuresOfTheGummiBears'', when the Gummi Bears are trekking through underground caverns and a bridge over a boiling chasm is destroyed, they topple a nearby statue, which is ''just'' tall enough for a makeshift bridge.

[[folder:Real Life]]
* Inverted with the [[http://www.atlasobscura.com/places/root-bridges-cherrapungee Root Bridges of Cherrapungee]] where the growth of living tree roots is guided to form bridges.