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==Transportation and Infrastructure==
Medan is an important transportation junction and a transit stop on several significant travel routes. It is connected to other Indonesian provinces and neighboring countries via various airline services operating at [[Kualanamu International Airport]], the third-largest airport in Indonesia. The city showcases numerous transportation mediums, including the old Sabang Merauke Raya Air Charter known as [[Sabang Merauke Raya Air Charter]]. Besides airway connections, Medan has a well-developed railway system with its main railway station, [[Medan railway station]], offering both intercity services and access to the Kualanamu Airport.
=Trapdoor=
==Trapdoor in Architecture and Design==
A trapdoor is a door set into a floor or ceiling, often found in historical or specialized structures. In the United Kingdom, for example, the [[Execution chamber]] or the "Execution Suite" used to feature a large trapdoor, usually double-leaved, as part of its design. These trapdoors, some even single-leaved at older chambers such as at Oxford, served in setting up the execution mechanisms.
Trapdoors are also found in less sinister contexts, such as [[5 North St]], a 400-year-old building with a wine cellar accessible through a trapdoor in the women's bathroom. In [[Hobo's]], a restaurant, access to the tunnels was through a trapdoor and stairs in the basement. Similarly, in [[Mountaintop Motel Massacre]], a film, trapdoors were used as connectors to a network of hidden tunnels.
In the world of toys and board games, such as in [[Green Ghost]], trapdoors covered boxes containing various items, providing fun surprises for players. In architecture, trapdoors could also provide access to hidden compartments or rooms, ranging from small closets to large basements. In castles like the [[Clitheroe Castle]], trapdoors were thought to provide access to different areas of the structure.
==Trapdoor in Marine and Aerial Transportation==
Trapdoors played important roles in the design and operations of many types of sea vessels and airborne vehicles. On sea vessels like the [[SS William S. Ladd]], [[SS John P. Gaines]], and [[SS John Burke]], large hatches above cargo holds served as trapdoors allowing the quick loading or unloading of cargo. Similarly, the [[MV Rocknes (2001)]] was designed with hatches, serving as trapdoors, over its holds for loading cargo.
In airships like [[SM U-12 (Austria-Hungary)]], unique cloverleaf-shaped design hatches that rotated on a central axis served as trapdoors for torpedo tubes. However, these trapdoors didn’t prove efficient in other designs such as the [[SM U-21 (Austria-Hungary)]], whose main hatch's seal failure led to long durations of inaction.
Trapdoors have also been used for comedic effect in animation such as in [[Box Car Blues]], where Bosko, the protagonist, uses a trapdoor to navigate and perform actions.
==Trapdoor in Theatre and Cinema==
Trapdoors have had a significant influence on theatre and film, especially in the creation of theatrical special effects or stunts. Many theatres, such as the [[American Airlines Theatre]] and [[Tibbits Opera House]], were equipped with trapdoors to easily shift scenery or produce varied effects.
Trapdoors have a large presence in cinema as well, for example in [[The Infernal Cake Walk]] and [[The Vanishing Lady]], both by Georges Méliès, where trapdoors were used to carry out stunts and scenes that seemed magical or impossible.
During the 17th-century Restoration period, a genre called [[Restoration spectacular]], began to feature trapdoors extensively. These "machine plays" used extensive special effects, such as trapdoors to create illusions, and produced spectacular imagery like "flying" actors and fireworks.
Finally, in literature, trapdoors were featured prominently in Gothic fiction, for example, in [[Cajetan Tschink]]'s works where séances were simulated using trapdoors among other stage effects.
==Trapdoor in Game Shows==
In modern game shows, trapdoors have been used to add excitement and anticipation. In shows like [[The Million Peso Money Drop]], [[5 Million Money Drop]], and [[The Million Pound Drop]], contestants have to place money on trapdoors representing different answers to questions. If they choose correctly, they retain the money placed on the correct answer. However, incorrect answers lead to the trapdoor's opening, and the money is dropped and lost.
Another variation of trapdoor use in game shows is in [[Who's Still Standing?]], where contestants stand on trapdoors which open if they answer a question incorrectly, causing them to drop out of the game. Similarly, in [[Prvi glas Srbije]], an act that receives a majority of red signals from the judges sees the trapdoor beneath them open, their time on the show thereby ending.
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