Are there movie sequels in which the original movie can be seen? [closed]

This has happened a few times in horror films.

For example, Scream 2. It opens with two characters attending a preview screening of Stab, a film based on the murders by Ghostface in the first film.

This technique is also applied in Wes Craven's New Nightmare, a horror film where all the characters from the A Nightmare on Elm Street series appear as themselves. The idea is they are shooting a new movie and Freddie Kreuger comes to life in the real world. Wes Craven himself appeared in the movie, as himself. To break with the answer for one moment, it's definitely a movie worth seeing. Very bizarre and not a technique used very often!

Yes. There are a few, at the very least.

The movie Grave Encounters 2 is about a fan of the first movie trying to prove it was real. So in this movie, the first Grave Encounters exists as a movie, while the sequel is "real."

A film student who is obsessed with the movie Grave Encounters sets out with his friends to visit the psychiatric hospital depicted in the original film.

For people who don't believe the events of Grave Encounters, film student Alex Wright is out to prove them wrong. Alex is as obsessed with the first film as the 20 million people who viewed its viral trailer on YouTube. While he and his friends research the events and visit the real psychiatric hospital depicted in the original film, they find themselves face-to-face with unspeakable evil, banking on the hope that their knowledge of the original film will help them survive the sequel.

Here is the trailer.

Also, the people in the movie Book of Shadows: Blair Witch 2 are visiting the area because of the popularity of the movie, The Blair Witch Project.

In November 1999, a group of young tourists arrive in Burkittsville, Maryland after seeing The Blair Witch Project. The group includes Stephen and his pregnant girlfriend, Tristen, who are researching the Blair Witch for a book they are writing; Erica, a wiccan; Kim, a goth psychic; and Jeff, their local tour guide.

Here is the trailer.

And as @AnkitSharma mentions, The Human Centipede is another similar scenario.

In The Last Action Hero, Arnold Schwarzenegger's character (and his arch nemesis) 'come out' of their own action movie and experience the real world. They are eventually exposed to all of the prequels to their current film. This has a major impact on their final show down.

In Back To The Future 2, Marty and Doc go back to the the timeline which took place in the first movie. Although they did not experience the first movie in film form, they were able to watch it in person.

Although Space Balls did not have a prequel, there is a moment in that film where they watch their own movie (using an advanced technology.) By doing this, they discover major plot points, as well as experience a space time paradox by watching themselves in real time, otherwise know as 'now now'

Eddit =================

HELMET: What the h--- am I looking at? When does this happen in the movie?

SANDURZ: Now. You're looking at now, sir. Everything that happens now, is happening now.

HELMET: What happened to then?

SANDURZ: We passed then?

HELMET: When?

SANDURZ: Just now. We're at now, now.

HELMET: Go back to then.

SANDURZ: When?

HELMET: Now.

SANDURZ: Now?

HELMET: Now.

SANDURZ: I can't.

HELMET: Why?

SANDURZ: We missed it.

HELMET: When?

SANDURZ: Just now.

HELMET: When will then be now?

SANDURZ: Soon.

HELMET: How soon?