DAN 004 wuz ere takin over ur druft
Alternate title: Emergency Vehicle Separation
One or more characters are travelling somewhere in a vehicle. The vehicle is damaged, runs out of fuel, the reactor malfunctions, etc. Or maybe it's just not fast or maneuverable enough. Normally that would be bad news for everyone on board, but instead someone pushes a switch and a large section of the vehicle containing the problem detatches itself, leaving the characters with a smaller, undamaged, fully fuelled vehicle to continue the mission.
There was a commercial for some beer company (possibly a Superbowl Special) where an airplane full of passengers and cases of the beer was forced to land place far away from any help. The pilot (or someone) says that in order to get back up they have to reduce the weight of the plane, the assumption being that they'll have to leave the beer behind. The next shot is the plane taking off, without its outside fuselage.
In "Eternal Story", the Star Leaf's forward section splits apart to reveal a landing pod that can act as an oversize escape pod.
In "Destruction", a heavy shuttle detaches the rear section to act as a decoy while the forward section and mecha launched from it's cargo hold infiltrate an Elaborate Underground Base.
In Break Blade, the Delphine goes into battle wearing colossal heavy armor plates. Once those are too damaged to help anymore, Rygart drops them and gets about 200% faster.
Played for laughs in Tengen Toppa Gurren Lagann with the Dai-Gurren, a mobile fortress in the shape of a humanoid mecha with a knife-shaped battleship deck positioned in order to affect a Gag Penis. During the Battle of Teppelin, the Dai-Gurren rams the enemy city's giant hammer with the knife section, then "detaches" by sliding out of it and running away. The remnant is shaped like a skeletal pelvis.
Downplayed in the issue of G.I. Joe: A Real American Hero that introduced the BATs. The Awe Striker is being pursued by a Cobra Stinger driven by one of the BATs and their main cannon has been unloaded. When Bazooka complains about the situation, Crankcase suggests getting rid of the cannon to save them some weight. He does and throws the cannon at the Stinger, decapitating the BAT.
In Ice Age III, Scrat the squirrel and his love interest are fighting over an acorn when a geyser erupts beneath them, sending the three and a large rock skyward. As the two squirrels climb the rock toward toward the acorn, the bottom of the rock falls away in a Shout-Out to staged rockets (see below).
In Transformers: The Movie, the Autobots perform an "emergency separation" of the front cockpit so the rear portion would be destroyed and fool the Decepticons into thinking they were killed.
Arcee: "Did we have to let them detonate three-quarters of the ship?"
Springer: "Seeing as how they were going to detonate four-quarters, I think it was a good choice."
In Thunderball the SPECTRE yacht separates to transform into a faster hydrofoil ship. The remaining section is still usable as a gun platform and boat dock.
In Star Wars: Attack of the Clones, Obi Wan Kenobi's starfighter is shown to have a separate bulky hyperdrive section that it docks with to travel in Hyperspace. As soon as he drops back into real space, his fighter disengages and continues on its way, leaving behind the extra mass to allow his ship to stay as lean as possible.
The Dark Knight has Batman ejecting from the Batmobile on a motorcycle, leaving behind the damaged part to self-destruct.
In Batman Returns, this happened as well. The Batmobile split off the flarings on either side and the wheels retracted to form a vehicle (the "batmissile") that could fit through a narrow alley.
Death Race - the hero's car has a 6 inch thick armor plating in the back called "The Tombstone". When it gets damaged, the hero jettisons it in the hopes that it will damage the car behind him.
In Van Helsing, when the titular character's riding a horse-pulled cart away from Dracula's brides, he has to sacrifice the cart in order for his horses to jump over a ravine. The brides fly towards the falling cart, thinking that Anna and the Frankenstein's Monster might be inside... and then they're greeted by silver stakes instead, courtesy of the exploding cart.
Minus the vampires, Van Helsing's tactic of cutting the horses loose from a doomed stagecoach and riding them to safety is a classic for old Westerns.
The Green Hornet film showcases that the Black Beauty has front-wheel drive, which allows the car to keep on moving when the rear end is torn off by an elevator.
In Innerspace, the assassin pulls this trick when his miniaturized pod is damaged beyond repair. In the style of an Implacable Man he ejects himself out of it and continues attacking the hero wearing a gadget-loaded space suit.
In Star Trek: First Contact where a Borg sphere shoots out of the nearly destroyed Borg cube and carries on with its mission to assimilate the Earth.
In The Core, the vehicle carrying the scientists to the centre of the Earth becomes progressively more damaged, and damaged sections must be jettisoned.
Occurs during the second battle between the smaller British Surprise and the larger French Acheron in Master and Commander: The Far Side of the World, when a cannon shot by the Acheron fells a mast on the Surprise. One poor sailor falls into the raging sea with the debris, and desperately tries to climb the rigging back aboard the Surprise. However, the rigging and the mast debris are acting as a sea anchor, slowing the Surprise in its flight to escape the pursuing Acheron. Captain Jack orders the rigging cut, to gain speed by marooning the sailor.
In the opening of Pitch Black, the co-pilot of the space transport faces a moral dilemma: should she eject the rear compartments of her crashing vessel (one of which contains passengers) to improve the chance that the forward compartment in which she's sitting won't be destroyed? Several cargo compartments are purged, but the pilot intervenes and stops her from sacrificing the one with the passengers.
The drill vehicle in The Core was designed to jettison damaged parts. In the end, they force-jettisoned the ship segments to pull off their big plan.
Startide Rising has a mostly dolphin-crewed starship unable to escape its pursuers...until it suddenly jettisons all its swimming-around water. The pursuing ships smash into the resulting ice cloud and go boom, and the suddenly much lighter Terran ship easily outruns the survivors.
During the railway pursuit of kidnapper Baron von Leinsdorf in Nicholas Meyer's Sherlock Holmes thriller The Seven Per Cent Solution, Holmes and Watson demolish the train cars from back to front to fuel the locomotive's boiler. Once each car was bereft of combustibles, it was uncoupled. This effort succeeds in catching up to the Baron's special. This sequence was faithfully adapted to film in 1976 by Universal Pictures.
In the Buck Rogers in the 25th Century episode "Space Vampire", the ship that the Vorvon and Vamp!Wilma escape on is programmed to fly into a star. Once the star's radiation returns Wilma to normal, she detaches the rear portion of the ship and flies to safety while the Vorvon continues into the star in the front portion.
A specific Top Gear example: the Homemade Limo challenge. Clarkson's Absurdly Long Limousine had to have a large section removed to be made road legal. The modification was poorly done, and the limo eventually split apart. Undeterred, Clarkson plops the celebrity he's escorting in the front passenger seat and drives off in the front half, leaving the rest behind.
In the Doctor Who episode "Castrovalva" we learn that in an emergency the TARDIS can eject one quarter of itself in order to propel it. Problem: you can't decide which quarter will be ejected, it just might be the part you're standing in at the time.
In Final Fantasy VII, the ending FMV of has an emergency switch to eject the bridge from the Highwind.
Many Gradius-like shoot-em-ups have this trope in force (creating Sequential Boss in the process) it's impossible to list them all. They all follow a similar pattern: shoot the large flying mechanical boss; when it takes enough damage it ejects the damaged portions, becoming smaller, but faster and more likely to unleash Bullet Hell upon you.
The final boss in FTL: Faster Than Light which loses a wing and escapes after you beat it the first and second times.
Birdman episode "Number One". When Birdman breaks into the title villain' pirate satellite, Number One activates a Self-Destruct Mechanism and escapes in the detached head of the satellite.
The Galaxy Trio episode "The Duplitrons". When a rocket pod the Trio are flying in malfunctions, Meteor Man presses a button and the pod splits in half. The rear section falls away and Meteor Man continues to fly on in the front half.
Many larger rockets are designed to stage, separating an engine along with the now empty fuel tanks feeding it to lighten the load after reaching the upper atmosphere, perhaps most notably the Saturn 5, which may have been the Most Triumphant Example.
Allegedly, some passengers incorrectly believed the Titanic could do this.
Five hats means that five tropers think it is ready to publish.
You are saying that you think this draft is ready to be published. That means the description is not ambiguous,
it doesn't duplicate an existing trope, there are at least three examples, and the title makes sense.
Is that what you meant to do?
You are saying this draft has a ready-to-publish hat it does not deserve and you are taking it back.