It is the movie that has probably affected more people on a deep, psychological level than any other film in history. Two chords, and you know exactly what is coming. Two chords, and you think about the monster and what it could do to you in the water. Even a glance at the poster sticks with you your whole life—because great white sharks actually exist, and yes, sometimes they eat people.

It is almost impossible to do justice to the greatness of a film that spawned three sequels, launched the careers of arguably the greatest movie director and film composer of all time, saturated popular culture with knock-offs and parodies, and single-handedly created the summer blockbuster. Jaws (1975) is one of the greatest movies of all time. But it's also one of the scariest.

Not in a supernatural jump-scare way, a knife-wielding maniac  ...