Question: Which 2006 British-American mockumentary comedy film was Bad Grandpa a reminiscent?

Context paragraphs:
The Independent (2000 film): The Independent is a mockumentary comedy film made in 2000, directed by Stephen Kessler and starring Jerry Stiller and Janeane Garofalo.  Stiller portrays an independent film maker who makes little-known B movies with titles like "Twelve Angry Men and a Baby".  The film spoofs independent directors and independent film.  The movie features Max Perlich and cameos by Anne Meara, Ron Howard, Roger Corman, Peter Bogdanovich, John Lydon, Ben Stiller, Andy Dick, Fred Dryer, Jonathan Katz, Fred Williamson, Karen Black, Nick Cassavetes, Julie Strain and adult film actress Ginger Lynn.  The fictional career of Morty Fineman (Stiller) includes having made 427 films, although it is not specified as to whether he directed them all or if it refers to films produced or written by the Fineman character.  The theme song "The Love Song For 'The Independent"' is performed by Nancy Sinatra.

Confessions of a Porn Addict: Confessions of a Porn Addict is a 2008 Canadian mockumentary comedy film directed by Duncan Christie starring Spencer Rice and Mark Breslin.  The film screened at multiple film festivals (Just for Laughs, Montreal, Calgary International Film Festival) as well as the Los Angeles-based MockFest where it won Best Feature, Best Cinematography and Best Actor (Spencer Rice) in 2008.  It's been called "The most straight-faced mockumentary ever made" (Andrew Dowler, Now Magazine Vol 28 No14) and the viewing public is often fooled into thinking it's a real documentary.

David Brent: Life on the Road: David Brent: Life on the Road is a 2016 British mockumentary comedy film written, directed, and produced by Ricky Gervais and released by Entertainment One.  The film stars Gervais as David Brent, a character he played in the BBC television comedy series "The Office", who has a film crew that shadows Brent as he travels up and down the country living his dream of being a rock star.  Gervais said, "This film delves much more into his private life than "The Office" ever did and we really get to peel back the layers of this extraordinary, ordinary man."  He has emphasised that it is "not an "Office" film".

Borat: Borat!  Cultural Learnings of America for Make Benefit Glorious Nation of Kazakhstan (or simply Borat) is a 2006 British-American mockumentary comedy film written and produced by British comedian Sacha Baron Cohen who also plays the title character, Borat Sagdiyev, a fictitious Kazakh journalist travelling through the United States recording real-life interactions with Americans.  The film was directed by Larry Charles and distributed by 20th Century Fox.  Much of the film features unscripted vignettes of Borat interviewing and interacting with Americans, who believe he is a foreigner with little or no understanding of American customs.  It is the second of three films built around Baron Cohen's characters from "Da Ali G Show" (2000–04): the first, "Ali G Indahouse", was released in 2002, and featured a cameo by Borat, and the third, "Brüno", was released in 2009.  The film is produced by Baron Cohen's production company, Four By Two Productions ("Four By Two" is Cockney rhyming slang for "Jew").

Jackass Presents: Bad Grandpa: Jackass Presents: Bad Grandpa is a 2013 American hidden camera comedy film directed by Jeff Tremaine and written by Tremaine, Spike Jonze and Johnny Knoxville.  It is the fourth installment in the "Jackass" film series.  The film stars Johnny Knoxville and Jackson Nicoll.  It was produced by MTV Films and Dickhouse Productions and distributed by Paramount Pictures.  The film was released on October 25, 2013.  "Bad Grandpa" has a loose narrative that connects the stunts and pranks together (in a manner reminiscent of "Borat"), as opposed to the three original "Jackass" films which did not have a story.

Borat (disambiguation): Borat is a 2006 mockumentary comedy film directed by Larry Charles.

A Mighty Wind: A Mighty Wind is a 2003 American mockumentary comedy film about a folk music reunion concert in which three folk bands reunite for a television performance for the first time in decades.  The film was directed, co-written and composed by Christopher Guest.  The film is widely acknowledged to reference the 2003 tribute concert to folk music producer Harold Leventhal that reunited several of the folk groups that Leventhal had managed.  More broadly, the film is a parody of the American folk music revival of the early 1960s and its personalities.

Pittsburgh (2006 film): Pittsburgh is a 2006 mockumentary comedy film that follows American actor Jeff Goldblum as he attempts to secure a green card for his Canadian actor/singer/dancer girlfriend Catherine Wreford by appearing with her as the leads in a summer regional theatre production of "The Music Man" in Goldblum's hometown of Pittsburgh, Pennsylvania.  The film features numerous other famous personalities portraying themselves, including Ed Begley, Jr. (who had worked with Goldblum on Transylvania 6-5000), Illeana Douglas (who directed Goldblum in her own film "Supermarket"), Moby (as Douglas's boyfriend), Conan O'Brien and Craig Kilborn (hosting Goldblum on their respective shows), Alanis Morissette, and Tom Cavanagh.

Brüno: Brüno is a 2009 British-American mockumentary comedy film directed by Larry Charles and starring Sacha Baron Cohen, who produced, co-wrote, and played the gay Austrian fashion journalist Brüno.  It is the third film based on one of Cohen's characters from "Da Ali G Show"; the first were "Ali G Indahouse" and "Borat".

An Alan Smithee Film: Burn Hollywood Burn: An Alan Smithee Film: Burn Hollywood, Burn (the onscreen title is simply Burn Hollywood Burn) is a 1998 American mockumentary comedy film directed by Arthur Hiller (using the Alan Smithee pseudonym), written by Joe Eszterhas, and starring Eric Idle as the protagonist, a director unfortunately named Alan Smithee.  The film follows Smithee as he steals the negatives to his latest film and goes on the run.

Supporting paragraphs: Jackass Presents: Bad Grandpa Borat
Answer: Borat