Sometimes Star Wars creators have a hard time remembering all the interesting concepts that have been added over the life of the franchise.

The Star Wars universe is so vast, encompassing so many movies, TV shows, games, and more, that it is really hard to keep track of things introduced in different installments of the franchise.

Generally, when something new is introduced, it is established in the canon to become part of the world, but sometimes Star Wars adds things only to never return to them.

Disclaimer: They may have appeared elsewhere in the lore, but we are going to take a look at things that only appeared once in the movies and TV shows.

Force speed

Force-speed is a special technique used by Jedi and Sith alike to gain a speed boost to escape dangerous situations or gain the upper hand in battle.

Though it appears quite frequently in Star Wars video games, its first and only big screen appearance came at the beginning of Episode I – The Phantom Menace, where it was used by Obi-Wan Kenobi and Qui-Gon Jinn to escape a droid ambush.

Ship cloaking technology

Another example of an item that often appears in video games, but only once on screen.

An experimental stealth ship, the IPV-2C Stealth Corvette, was used by Anakin Skywalker during the Siege of Christophsis in the sixteenth episode of season two of the Star Wars: The Clone Wars animated series.

Although the cloaking technology is referenced several times in the other Star Wars films and shows, this was the only time it was shown in action.

Facial transformation and vocal emulator

During a four-part storyline in season 4 of The Clone Wars, Obi-Wan Kenobi goes undercover under the alias of bounty hunter Rako Hardeen.

To do this, he undergoes a procedure that changes his facial bones and muscle structure to be identical to the aforementioned bounty hunter.

He also swallows a small device to change his voice. Fans wonder why such sophisticated technology has not been used by, say, Imperial spies to infiltrate Rebel ranks. It seems that from a storytelling perspective, it is simply too overwhelming.

Hyperspace ram

This is more in the “we hope it stays forgotten” category. The suicide tactic used by Admiral Holdo to destroy the First Order flagship in Episode VIII – The Last Jedi is ridiculously overpowered and highly questionable in terms of how it would even work.

After its introduction, it was only mentioned once in Episode IX, and for the sake of common sense in the universe, it should stay that way.