Weld the Lock
A cousin trope to Shoot Out the Lock: In speculative fiction, when you want the door to close and stay that way for a while, you weld it shut with a laser or similar device.
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- Deadpool once did this to a door to keep his sort-of girlfriend Siryn out of the room while he tried to kill the doctor who gave him his powers. Unfortunately, a melted lock isn't much use against a sonic scream.
- In Batman: Death by Design, Exacto power-welds the door of a crane shut, sealing Batman, a journalist and a union boss inside just minutes before an explosion is due to send the crane toppling from the roof.
- In Aliens, the team welds the doors leading to Operations shut to keep out the Aliens. They come in through the ceiling instead.
- In Star Trek: Nemesis, Picard seals the door to the shuttlebay, but discovers that that door is the only way out.
- Star Trek IV did it earlier than Nemesis above; Kirk uses a phaser to melt the lock on a door he locked some 20th-century medstaff in. The staff inside are a little surprised at the rather blatant breaking of the Prime Directive, even by the standards of a captain well known for playing fast and loose with said directive.
- Treasure Planet: Captain Amelia welds the lock on a hatch in order to keep out the rampaging pirates.
- Galaxy of Terror: Used in the beginning by a fleeing crewman.
- A non-scifi example is mentioned in The Day of the Jackal. To prevent themselves from being kidnapped by the French Action Service, the OAS leaders hiding out in a hotel in Rome weld shut the lift doors on all but one floor, which is guarded by their men.
Live Action TV
- In an episode of Firefly, Saffron uses some sort of heating strip thing to weld shut the door to the cockpit.
- Babylon 5: Garibaldi and the Mars Resistance blow the lock on an Earthforce outpost (depressurising it to immobilise those inside) then weld it shut again. They might have just been repairing the damage however, because someone walks through the door later on.
- Stargate SG-1 did this with the Stargate iris on a few occasions. The first time it was done to the Beta gate after it had been stolen and used to steal from friendly worlds. The second was to their own gate to prevent any dial ins completely while they tried to extract Teal'c from the buffer.
- Done just for the cool factor in The Dukes of Hazzard: The doors of General Lee are welded shut, driver and passenger systematically use the always-open windows.
- In Space: 1999, a mind-controlled crewman welds shut the door of a nuclear waste storage silo, to buy time for rigging it to explode.
- In Killjoys there is a type of Abnormal Ammo that can "bolt" a door shut.
- When you and a few survivors first barricade yourselves in the Security Room in Dead Rising, Otis welds the entrance door shut. Oddly, when the army shows up, the door becomes un-welded (not destroyed) with no explanation.
- During your breakout from the Empirical in Star Wars: The Force Unleashed, a cutscene shows a purge trooper welding shut a door through which you have to go. You also have to go through the purge trooper and two EVO troopers.
- In recent times, this has been abandoned in favor of cutting the wires, but let it be known that welding an airlock shut was in Space Station 13 first.
- You can do this in Alien Swarm to close or open doors.
- You do this in Killing Floor. You can also unweld previously welded doors if the specimens start attacking you from a different angle, forcing you to escape through the door you were just trying to make impassable. "I told you, I am WELDING this DOAH!"
- Shows up a couple of times in Batman: Arkham City, forcing Batman to find a different route.
- Several of the Alien tie-in games-most recently Aliens: Infestation (A Metroid Vania taking place on a Xenomorph-infested Sulaco and Aliens: Colonial Marines (An FPS taking place on Acheron)-have lock-welding as a gameplay mechanic.
- The pilot of Teen Titans shows Starfire welding the door shut to keep out Mammoth. It doesn't hold long.
- Alexander Luthor welds the vault door to slow down the Crime Syndicate in the direct to DVD Justice League: Crisis on Two Earths.
- Kid vs. Kat: Kat does this several times to the Kat Kommander's rebellious son in "Rebel with a Claw"; once to seal him in a room to get him out of the way, and later to seal him in his transport module before they launch him back into space.
- Buzz Lightyear of Star Command:also does this in the pilot.