Big Damn Fire Exit

Maybe you just killed a Load-Bearing Boss, maybe the bad guy built his fortress out of explodium or maybe you're leaving the Castle of Doom, having thwarted the Big Bad's nefarious plot, or perhaps you're just in a spot of bother. Whatever the background to your current plight, the room you're in is now in bits, or is falling to bits and you're screwed. No, we mean really screwed. The excrement has collided with the cool-air-blower-thingy.

There just has to be a way out, right? Well, yes. Because if there wasn't, the section would be Unwinnable. And we can't have that now, can we?

This trope basically relates to the necessity in video games (and other media) for an escape route to exist, no matter how improbable that might be in real life. When the building around you is exploding, collapsing, on fire, in the process of being destroyed or has already been destroyed, there will invariably be one surviving path you can use to make good your escape. If the building's on fire, there will be one (und precisely von) non-burning walkway. Because fire is nice and sporting like that; it lets you win. Collapsing tunnels, building-demolition traps, self-destruct devices, etc can all fall under this trope. Whatever the cause of the destruction, it may have happened before you got there, or it may be a Scripted Event. Regardless, it's just asking for the player to execute a dramatic Indy Escape.

Note - this shouldn't be due to the game locking the door behind you or in front of you. It applies specifically to (apparently) random destruction of the environment. Almost as if the 'right' way to go is made out of the same material as the Empathy Doll, the escape route will in most cases never actually catch fire or disintegrate itself, allowing you to Take Your Time.

Named after (and confrontable with) the trope Big Damn Heroes.

This trope is particularly prevalent in video games, though movies also have some examples. Video games have the possible advantage of an Acceptable Break From Reality.

Film

Star Wars: The Empire Strikes Back:

Han Solo: Better take off - I can't get to you, I'll get her out in the Falcon.

Video Games

F.E.A.R. - following the nuke that goes off in the first game, the expansion sees you clawing through the wreckage of a building your chopper just crashed into. Despite every other stairwell or gangway being wrecked, there is always one left conveniently open for you. This game does it in a number of areas, barricading all but one door for you to head through. Cue a long enemy-ridden trudge through a row of terraced-houses as you attempt to hook up with your teammates who are waiting on the floor above.
Halo - Oh wait, you just set off a chain reaction that will obliterate the ring. And you need to reach the Pillar of Autumn 's Longsword hangar, while the station's blowing up all around you? Oh, how convenient that no matter how much shit blows up you will always have a clear and workable route. Not to mention the Warthog conveniently not having been destroyed by oh, I don't know, a hundred thousand tons of starship crash-landing and being utterly gutted by fire, plasma and destruction.
- Similar, but not so implausible - the first level aboard the Autumn. You follow a guy down a corridor. He gets a bad case of dead when a doorway explodes in his face, but oh look - a passageway between the pipeways is there for you, so you can still reach The Bridge.
- Also happens in the ending of the third game the ring is blowing the fuck up, again, and the ground breaks under your feet. This one is slightly more plausible, in that if you screw around too long, the ground will fall out from under your feet, sending you to your death. There is still a clear path to the extraction point though.
Half Life has this happen a number of times - things will collapse or stuff will fall apart, but you'll always be able to find the (only) way around.
- Arguably justified in Half-Life 2. You're under the supervision of the G-Man as he makes subtle "arrangements" to ensure you have everything you need to fulfill your "contract".
Singularity plays the trope straight. Walls will collapse during the fire but you'll find the exit.
Unreal does this, particularly in the single-player story-driven games. You walk down a corridor, *BOOM*, something blows up and gets in the way. Hmm, what about the Air Vent Passageway up there?
Mass Effect - A number of times, in both games.
Knights of the Old Republic - Starship corridors are basically Made of Explodium. Except the right one.
Vampire: The Masquerade Bloodlines - The haunted hotel has it. Just tread carefully.
- Also, the Grout mansion.
Modern Warfare 1 subverts this when escaping from a sinking ship. While there is a route back to the waiting escape chopper, the boat's not going to stop sinking to let you take your merry time. The path WILL collapse at certain places leaving you to drown.
Modern Warfare 2 does this two times: first in the Brazilian favelas, where a conveniently placed series of corridors through the huts allows you to reach the helicopter and escape from the onslaught of a gazillion angry militiamen. The second time it's in the Russian prison, where after the exit is blocked out by debris Captain MacTavish says "Don't worry, we'll find another way out!" ( which could be considered Lampshade Hanging, or being Genre Savvy to the point of Leaning on the Fourth Wall.. or simply being a kickass commander and motivator.). And another way out is obviously found, allowing everyone to merrily head towards World War 3.
The first level of Left 4 Dead 2 sees the gang fleeing out of a burning building, down the conveniently fireproof escape route.
Max Payne has "escape from a burning building" sequence in both games. That One Level for some as straying just a bit from the intended path or being too slow results in instant death.
In Heavy Rain, escaping the fire in the Killer's Place requires you to find the one usable route through the apartment, though in their defense, it sometimes involved walking over furniture, or moving furniture out of the way - or even jumping across burning areas.
Persona 2 dumps the heroes inside an aerospace museum with a bunch of visiting schoolchildren...plus a Time Bomb. Not only do you have to weave between the nonsensically-placed stairwells and get to the roof, but you have to rescue the kids stranded in various rooms. And then you get to do it all over again in the sequel!
There are also at least two sequences in the The Godfather: The Game where you have to find your way through a burning building - and yep, everything is burning, except that one path that leads straight to your goal. (In fact, this game is somewhat of a serial perpetrator of this - all of the Warehouse and Transport Hub missions use the same two-or-three warehouse-maps, but lock and block different doors and stairwells while placing the Racket Boss in different places to ensure that you always have just ONE route to take, but it's a different one each time.)
Silent Hill: Origins - Travis has enough time to enter the burning Gillespie house and rescue Alessa from it. True to Silent Hill, however, his progress is balked by unopenable doors everywhere and occasionally bits of house collapse dramatically all around him.
Final Fantasy VI - When you're going to rescue Relm, there's conveniently a path that leads directly to her, even though the entire building is on fire and the roof is collapsing.
Mario & Luigi: Superstar Saga has you go through Bowser's castle at the end. Of course, when you beat the villain, the place starts blowing up. You expect to have to walk through the entire pseudo-maze of Bowser's castle again, but then you realize that behind his throne is a door with a pair of stairs that leads to the front door. That's all it is. A pair of stairs.
Metroid Fusion has several of the collapsing door/inaccessible wall variety, and the convenient exits largely involve Samus breaching security and angering her Federation clients.
- The Metroid series may be king (er, queen) of this trope. There are few if no games where Samus ends up calmly walking back to her ship; there's always a time bomb that goes off once the last boss has been thrashed and the exit path is always clear to navigate despite the common falling debris.
In City of Heroes, the last mission of the "Hess Task Force" is set inside a volcano with a Load-Bearing Boss. There is an emergency exit that leads out, and 30 seconds to take it after the boss goes down. This is generally more than enough, unless a player gets lost or stuck. And with the later addition of powers like the Pocket D VIP teleport and the Ouroboros portal, it became possible to exist the mission without having to run for the door at all.
Guild Wars has a couple in Prophecies, both also Get on the Boat moments. In the Sanctum Cay mission, your character's original boat off the island is captured, but conveniently, there is a powerful mage on the island to summon another one. In the Hell's Precipice mission, your characters escape an erupting volcano by running to a boat that is conveniently available at an empty enemy dock.
In the original Tomb Raider (and the Tomb Raider Anniversary remake), after Lara destroys the Scion, the Atlantean pyramid starts to collapse all around her. A conveniently-intact exit allows Lara to flee to safety and confront antagonist Natla.
- In Underworld, Lara has to escape the burning Croft Manor.
Wasteland has an escape pod that appears after you set the self-destruct sequence.
The last sector of Jumper Two is the same tower from Sector 9 destroyed by OgmoBots and EvilBots. Doesn't seem to stop it from creating a path perfectly navigable with jumps, and there's a Pressure Plate puzzle out of nowhere that's still perfectly functional.
An escape route becomes available in Paper Mario once Mount Lalava starts erupting.
In World of Warcraft, the final boss of the new Heroic Deadmines, Vanessa VanCleef, begins to set off demolition charges aboard her (landbound) pirate ship when she senses her impending defeat. A conveniently placed set of ropes enables players to swing away from the explosion before landing back on the ship, shortly after which she detonates another set of charges. The players, once again, simply jump off the ship with the ropes and swing back. Rather than try this a third time (as she did in the initial release), after her hit points are depleted she instead pulls a Taking You with Me with a powder keg. Of course, there are conveniently a few safe places to hide from the blast amid the fires, after which you collect your loot.
At one point in Postal 2, you find yourself in a library that's just been set on fire. Predictably enough, there's only one safe route out.
There's a hotel in Saints Row 2 that consists of a bunch of rooms located around a central shaft. In the climax of one Ronin mission you end up parachuting down this shaft while the hotel explodes around you.
BioShock (series) begins with one: there's only one path through the flaming airplane wreckage, and it happens to lead directly to an island with a handy bathysphere...
Enter the Matrix. The post office explodes but there's a way through. Of course, this being the Matrix reality is a bit funky.
Descent is possibly the ur-example from 1995. On each level you have to destroy a reactor, then escape through an emergency exit before being caught in the explosion. No matter how much time is left on the clock, the escape sequences always have the fire chasing right behind you through the escape.
Star Fox 64: After you defeat Andross, you must fly through the maze you entered to reach him in reverse order. You must constantly boost throughout this or you will be consumed by the fire chasing you.
In the final level of Flashback, you set a bomb to destroy the alien planet, and thus have a limited time to escape.
In the last level of Medal of Honor: Allied Assault, you have to escape from the exploding and collapsing Fort Schmerzen, with the fireball chasing you all the way.

Web Comics

This episode of The Order of the Stick

Real Life

Unfortunately for those of us in Real Life, this trope is frequently not Truth in Television.