AFI #086 Al Pacino as Sonny Wortzik from Dog Day Afternoon (1975)

Sonny: I don't wanna talk to some flunky pig trying to calm me man.
Det. Sgt. Eugene Moretti: Now you don't have to be calling me pig for...
Sonny: [Notices other officers moving toward him] What is he doing?
Det. Sgt. Eugene Moretti: [shouts at officers] Will you get back there!
Sonny: What are you moving in there for?
Det. Sgt. Eugene Moretti: [Runs toward closing officers] Will you get the fuck back there! Get back there will you!
Sonny: [Addresses other officers moving toward him] What's he doing? Go back there man! He wants to kill me so bad he can taste it! Huh? ATTICA! ATTICA! ATTICA! ATTICA ATTICA! ATTICA! ATTICA! ATTICA! ATTICA! ATTICA!
[Yells it too cheering crowd]
Sonny: ATTICA! ATTICA! REMEMBER ATTICA.

- Al Pacino as Sonny Wortzik from Dog Day Afternoon (1975)

Bolded portion is ranked #86 in the American Film Institute's list of the top 100 movie quotations in American cinema.