Requiem for a Dream (2000) is a film by Darren Aronofsky that follows the lives of four individuals, all of whom are addicted to some form of drug. Sara Goldfarb is a lonely, TV-obsessed widow who dreams of being on TV. She becomes hooked on diet pills in a desire to lose weight so that she will look good on TV. Harry Goldfarb, Sara's son, is a heroin addict who dreams of being able to “get off hard knocks.” His girlfriend, Marion, is addicted to cocaine and dreams of being a famous designer while Harry's best friend, Tyrone, is also addicted to heroin. The movie follows them as they pursue their individual dreams, all of which are fueled by their drug use but eventually become unattainable due to that same drug use.
In the sequence above, we see a film technique that Darren Arnofsky pioneered, called the hip hop montage. It is a series of fast cuts one after the other, accompanied by a mix of diegetic and non-diegetic sound.
For more information on Requiem for a Dream: http://www.imdb.com/title/tt0180093/