Question: R U Professional was a satirical song that partly referenced the 2008 superhero film directed by whom?

Context paragraphs:
Heard 'em All: "Heard 'em All" is a single by American R&B recording artist Amerie from her fourth studio album, "In Love & War", released in September 2009.  In U.S., the song served as the second single from the album, following "Why R U".  The official radio edit of the song features rapper Lil Wayne, with both versions being featured on the album.  Its release was confirmed by Def Jam's official site.  It was released in the UK on April 5, 2010.

The Social Network Song: "The Social Network Song (OH OH - Uh - OH OH)" (originally titled "Facebook Uh, Oh, Oh (A Satirical Song)") is a song by singer Valentina Monetta which was the Sammarinese entrant at the Eurovision Song Contest 2012.  At the Eurovision Song Contest 2012 the song finished in 14th place in the first semi-final with 31 points, although it did not qualify for the final, this was their best result since their début in the 2008.  "The Social Network Song" was the 20th Eurovision entrant produced by Ralph Siegel.

List of accolades received by The Dark Knight: "The Dark Knight" is a 2008 superhero film directed, produced, and co-written by Christopher Nolan.  It was released in Australia on July 16, 2008.  "The Dark Knight" grossed $1,004,558,444 worldwide, becoming the fourth film in history to gross more than $1 billion worldwide and the highest-grossing film of 2008.  It is currently the 16th highest-grossing film of all time.  "The Dark Knight" also received a high critical acclaim, accumulating an approval rating of 94% on the review aggregator site Rotten Tomatoes.

R U There: R U There is a 2010 Taiwanese-Dutch drama film directed by David Verbeek.  It was entered into the Un Certain Regard section of the 2010 Cannes Film Festival.  At the 2010 Netherlands Film Festival the film won the awards for Best Cinematography and Best Sound Design.

Why R U: "Why R U" is a song performed by American R&B singer Amerie.  The song was recorded for her fourth studio album, "In Love & War", and serves as the lead single from the album.The song contains excerpts of Ultramagnetic MCs' "Ego Trippin'".  The song is also Amerie's first single under the Island Def Jam Music Group.

R U Professional: "R U Professional" is a 2009 satirical song by the American indie rock band The Mae Shi, inspired by a July 2008 outburst by actor Christian Bale on the set of "Terminator Salvation".  Bale was filming with actress Bryce Dallas Howard when he berated director of photography, Shane Hurlbut, for walking into his line of sight.  An audio recording of the incident appeared on website TMZ on February 2, 2009.  The Mae Shi composed and recorded the song later in the same day, and released it the next day.  The group stated that the piece was created to honor Bale.  The song parodies Bale by sampling his voice from the 2008 diatribe.  The chorus incorporates Bale's use of the word "professional" from his flare-up.  The lyrics reference several films the actor starred in, including "Newsies", "Swing Kids", "American Psycho", and "The Dark Knight".

Thugs Get Lonely Too: "Thugs Get Lonely Too" was 2Pac's first single from his posthumous album "Loyal to the Game".  It features Nate Dogg singing on the chorus and was produced by Eminem.  It only charted at #55 on the Hot R&B/Hip-Hop Songs chart and at #98 on the "Billboard" Hot 100.  No official music video for the song was ever created.  In 1997, Tech N9ne recorded a verse for the song, while living with QDIII, who at the time was putting in work on "R U Still Down?  (Remember Me)".

The Joker (The Dark Knight): The Joker is a fictional supervillain from American comic book publisher DC Comics and the main antagonist in Christopher Nolan's 2008 superhero film "The Dark Knight".  He was portrayed by late Australian actor Heath Ledger.  Ledger's interpretation of the character is specifically influenced by the graphic novels "" and "".  In the film, he wears the character's traditional color palette, while his facial appearance includes clown makeup that covers facial scars of a Glasgow smile.

The Dark Knight (film): The Dark Knight is a 2008 superhero film directed, co-produced, and co-written by Christopher Nolan.  Featuring the DC Comics character Batman, the film is the second part of Nolan's "The Dark Knight Trilogy" and a sequel to 2005's "Batman Begins", starring an ensemble cast including Christian Bale, Michael Caine, Heath Ledger, Gary Oldman, Aaron Eckhart, Maggie Gyllenhaal and Morgan Freeman.  In the film, Bruce Wayne/Batman (Bale), Police Lieutenant James Gordon (Oldman) and District Attorney Harvey Dent (Eckhart) form an alliance to dismantle organized crime in Gotham City, but are menaced by a criminal mastermind known as the Joker (Ledger) who seeks to undermine Batman's influence and create chaos.

Iván Kamarás: Ivan Kamaras (born 22 December 1972) is a Hungarian actor who became first known worldwide for his role as Agent Steel in the 2008 superhero fantasy thriller "", directed by Guillermo del Toro.  In January 2011, he played a Hungarian detective, Tibor Orban, in "Bloodlines", the fourth episode in the 14th series of the BBC crime drama "Silent Witness".  In 2014 he played the role of Rasputin in the two-part History Channel miniseries Houdini.  He lives in Santa Monica, California.

Supporting paragraphs: R U Professional The Dark Knight (film)
Answer: Christopher Nolan