Question: What does Leslie Chow do while singing a portion of the song?
About the article "I Believe I Can Fly", section "In film and television".

Candidate passages:
Chow may refer to:  Chow Chow, a dog breed   Chow-chow, the food  A slang term for food in general (such as in the terms "chow down" or "chow hall")  Chow test, a statistical test for detecting differences between trends in time series  Chow (unit), an obsolete unit of mass in the pearl trade in Mumbai  Chow (website), a popular online food discussion site  Chow, an alternate name for the star Beta Serpentis  Mr. Chow, an upscale Chinese restaurant chain  The main Wade–Giles spelling of the Chinese surname 周, see Zhou (surname)  Leslie Chow, a character played by Ken Jeong in The Hangover trilogy of movies  
Other than appearing on the soundtrack for the film "Space Jam", "I Believe I Can Fly" was performed by the school band in the movie "Drumline" during the high school graduation ceremony of Devon Miles (Nick Cannon).
In "", Crash the possum sings the song before he crashes into a tree.
In the film "Good Boy!
", Wilson briefly sings the song while diving into a pool.
In "Fun with Dick and Jane", Jim Carrey sings along with the song as it is played in an elevator.
This song also appeared on the first American season of "The X Factor", where R. Kelly performed "I Believe I Can Fly" for the first time as a duet with the eventual winner of the show Melanie Amaro.
This song was also performed on "The Voice" as the last solo song for the second season's winner Jermaine Paul.
American musical TV series "Glee", performed a version of the song in episode fourteen of season three, "On My Way" (aired on February 21, 2012).
It is a mash-up track with the song "Fly" by Nicki Minaj featuring Rihanna.
In "The Hangover Part III", Leslie Chow sings a 12-second portion of the song, while parachuting through Las Vegas.
Chan won third prize at the "HK Pop Song Composition Competition" in 1977.
In that same year, he made his acting debut with Hong Kong Television Broadcasts (TVB) through a TV drama called "Sweet Babe".
In 1978, he won first prize at the "Hong Kong Yamaha Electone Festival".
He held his first music concert in Hong Kong that same year.
His first music album, entitled "First Love", was released in 1979.
The song , "Tears Dropping for You", from the album, became his well-known, most-played in radio stations (after the album release) , and most-welcomed song , especially for the HK community and fans , till now .
Chan subsequently signed a music contract with HK EMI, WEA, DMI, and finally moved back to Warner Music.
He started singing Cantonese songs, which some of them are still popular nowadays like Ripples, Just Loving You and Yat Sang Ho Kao.
The song, Tell Me What To Do, was sung with the co-operation with Crystal Gayle in 1984 .
The song , Remembrance on Parents' Love (1981) (念親恩) , is popularly played on radio stations and frequent chose to be sung in karaoke nowadays, especially on Father's Day and Mother's Day .
In the 1980s , Chan was a host in a TV show "Bang Bang" in early 80s .
His co-operation with Leslie Cheung and Paul Chung in films ,Encore (1980) and On Trial (1981), received lots of positive reception(s) from the public and media .
He was also a main character in the film An Autumn's Tale in 1987 , as Vincent (Jennifer's ex-boyfriend) , with Chow Yun-fat (as Samuel Pang) and Cherie Chung (as Jennifer) . 
Leslie is the male lizard who appears at the end of act I.
Like Charlie, Leslie is a bit more fearful, defensive, and mistrusting than his mate.
It is he who first watches the human couple.
Leslie is also the first to approach Nancy and Charlie, poking them in the side.
When Charlie does not reply right away, Leslie becomes frustrated.
While Leslie's guard remains high, especially around Charlie, for most of the play, he is also curious, much more so than his human male counterpart.
Both Leslie and Sarah speak English, though they do not understand many words and concepts of human life.
Leslie does not know what emotions are, what cooking or clothing is, or what the names of limbs are.
When Nancy tries to shake hands with him, he is completely unfamiliar with and mistrustful of the process.
Though Leslie wants to understand for the most part, he becomes impatient when the humans cannot easily explain complex things like love or consciousness.
Though Leslie does not possess or understand some human ideas like love, he does have prejudices against others.
Charlie tries and fails to explain what bigotry is to the lizard after Leslie speaks badly of fish.
Leslie thinks they are dirty and too numerous.
He also looks down on humans because they do not lay eggs.
Yet Leslie also has some empathy for the humans.
Leslie knows that he and Sarah must look odd to Charlie and Nancy.
He also understands that Charlie is being difficult when Nancy mentions that her husband thinks they are dead and that this situation is some sort of hallucination.
Leslie acts most often on instinct, like an animal.
When birds and jets fly overhead, he runs to find an escape route.
Leslie is very protective of Sarah.
When Charlie hurts Sarah—asking her what she would do if Leslie left and never came back—Leslie attacks him.
After hitting him, Leslie nearly chokes him until the females intercede.
After the incident, Leslie decides that he and Sarah will go back into the sea, to escape this threat.
When Nancy tells him that they will have to come back eventually and offers them help, it is Leslie who accepts this fate. 
The version was used in the movie "Colombiana" as well as in several TV series, including "Criminal Minds" ("Elephant's Memory"), "Smallville" ("Shattered"), "Person of Interest" ("The Devil's Share"), and "Parashat Ha-Shavua" ("BeShalach").
It has also been used in documentaries, such as "Why We Fight".
The song was also used in the trailer for the 2012 video game Prototype 2.
The song appears in "The Hangover Part III", albeit in two forms.
The Cash version is performed by the character Leslie Chow in a karaoke bar, while the original Reznor version appears in the final scene of the movie where upon Alan and Chow say their goodbyes.
The song was sampled in the "Westside Connection" song The Gangsta, The Killa And The Dope Dealer.
Texas Rapper, Yung God, also made a version of this song in 2013 where he mentions Cash and pays tribute to him.