Oblivion (2013), screenplay by Karl Gajdusek and Michael Arndt, original story and graphic novel by Joseph Kosinski https://www.youtube.com/watch?v=7mGr4Uc7ebA VICTORIA: No, we are not an effective team. DIALOGUE ON DIALOGUE: Throughout the story, Mission Control has monitored the condition of Victoria's and Jack's working relationship by asking the question, "Are you an effective team?" Victoria has always responded, "We are an effective team," until this point. Jack has begun to doubt their mission, and this change in Victoria's response shows how everything has changed for Jack in a few simple words.

Patton (1970), Screen story and screenplay by Francis Ford Coppola and Edmund H. North, based on factual material from Patton: Ordeal and Triumph by Ladislas Farago and A Soldier's Story by Omar N. Bradley. https://www.youtube.com/watch?v=dObTXYa-_n4 PATTON: Rommel, you magnificent bastard, I read your BOOK! DIALOGUE ON DIALOGUE: A character could give an entire monologue about how he had studied his enemy, the countless hours devoted to "knowing your foe," the endless internal debates about which strategy that might be used, and perhaps raise a toast at dinner to the enemy's defeat. Or, a character could sum it all up in a single sentence, as delivered by George C. Scott.

Star Trek II: The Wrath of Khan (1982), screenplay by Jack B. Sowards and Nicholas Meyer; story by Samuel A. Peeples, Harve Bennett and Jack B. Sowards; based on television series by Gene Roddenberry. https://www.youtube.com/watch?v=KqpcmQhnl48 SPOCK: The needs of the many outweigh... KIRK: ...the needs of the few... SPOCK: ...or the one. DIALOGUE ON DIALOGUE: Early in the film Spock made the comment to Kirk as a way to declare his philosophy and hint at the character's preparedness to sacrifice, though the original statement was made in relationship to Kirk taking command of the Enterprise from Spock. Now, having saved the ship while sacrificing his own life, Spock's statement calls back to that earlier discussion, and cements the character's dedication to living his philosophy through deed.

Rise of the Planet of the Apes (2011), written by Rick Jaffa & Amanda Silver, suggested by the novel "La planete des signes" https://www.youtube.com/watch?v=rg-NQgJkfH0 Dodge Landon: Take your stinking paws off me you damn dirty ape! Caesar: NO! DIALOGUE ON DIALOGUE: While the closing sentence uttered by Caesar at the end of the movie is very powerful on its own, I chose this is one as it is one of the most OMFG moments in film from this decade. Following the obligated line giving homage to the original classic movie, that single word uttered from the most unexpected character fully demonstrates the extent of Caesar's intelligence and the effects of the ALZ-112 drug. From that moment on we know that all hell will break loose.

The Jazz Singer (1927); Alfred A. Cohen (adaption), Jack Jarmuth (titles) based on a play by Samsom Raphaelson "You ain't heard nothin' yet." https://www.youtube.com/watch?v=22NQuPrwbHA DIALOGUE ON DIALOGUE: Yep, this movie is mostly a silent, but this brief sequence between songs was as prophetic as it was groundbreaking. That line helped propel motion pictures down the road they still travel today. Supposedly Al Jolson, who maybe should get the writing credit here, ad-libbed the line, and movie history was made. You ain't heard nothin' yet? The talking picture revolution had begun.

Movie – Rocky IV (1985) Written by Sylvester Stallone Youtube – https://youtu.be/2c3Y2i-1mD0 Drago: You will lose. Youtube - https://youtu.be/ygQvB6OjHOU Drago: I must break you. Comment - The entire character of Ivan Drago is about minimum words, maximum impact as he only has 6 lines in English and 2 in Russian. Talk about impact; he is the embodiment of Reagan's 'evil empire'

If I may add to my previous comment, in a single word Caesar manages to declare that he and his kind will no longer tolerate the bullying, the mistreatment, the pain; they are mad as hell and they will not take it anymore.

Absolutely. Coming as the first words out of the apes' mouths - at least as far as the humans are concerned - it packs a double wallop.