Jaws
Holy Shit.
It's taken me WAYYYY too long to watch this film and I am ecstatic I finally have. Williams' score is exploited efficiently and flawlessly by Spielberg.
The young Spielberg displays all the qualities which will make him and his films legendary. It's absurd to think that he was already constructing his legacy at the young age he was when he directed Jaws.
This film is truly flawless, and is rightfully one of the greatest thrillers of all time. The use of suspension, tension and setting is carried out masterfully by Spielberg.