Moment of Silence

When an important character dies, one way to ramp up the emotion is to cut all dialogue and sound effects, adding complete silence to the scene for perhaps ten seconds. Sad music, often with female vocalization, will usually be played to highlight the effect, but all other sound is cut out. Expect the visuals to consist mainly of other characters' reactions to the death, especially lots of screaming the dead character's name (silently), and general crying. Also expect the visuals to be in Slow Motion much of the time.

And, of course, there's also the literal moment of silence shown out of respect for the dead, but that's more about plot than cinematics.

Anime and Manga

 * End of Evangelion has this trope at the end of part 1, when Shinji finally decides to enter the battle... only to find that he's too late.
 * A variant is found in the final episode of the School Days anime. Makoto reads a text message that consists only of lots of blank lines and he scrolls down to the end where it just says "Goodbye", and all sound stops for a three second close up of the single word. Then the tragic music picks up and he is stabbed to death from behind.
 * Kittan and Kamina each get a short one in Tengen Toppa Gurren Lagann.

Film

 * A minor subversion in I Am Sam, where
 * The aftermath of the Battle of Hogwarts in Harry Potter and the Deathly Hallows, Part II.

Literature

 * Sirius's death in Order of the Phoenix.
 * Gandalf's death in The Fellowship of the Ring.

Live-Action TV

 * When major charaters die on 24 sometimes they go to commercial without the second-indicating beeps. Edgar Styles and George Mason come to mind.
 * At the end of the last episode of Blackadder Goes Forth, when they finally go over the top in no man's land there are no closing titles and the usual theme tune is replaced by a slow piano version and gunshot sound effects, finishing with three strong bass-drum notes as the scene fades to a poppy field.
 * The Blackadder ending came about almost by accident. They'd originally intended to show everybody falling, but it looked fake. Then they came up with the idea of slowing down the action and dissolving to a poppy field... and suddenly there wasn't a dry eye in the country.
 * The death of Buffy's mum, Joyce in Buffy the Vampire Slayer: the entire episode had very little dialogue and was the only episode in the entire series to contain no music, and so probably qualifies.
 * The death of Adric at the end of the Doctor Who episode "Earthshock". Not only was there no sound, instead of the usual closing credits there was just a closeup of Adric's broken badge.
 * Done in the new series to great effect at the end of "The Pandorica Opens", when the Doctor is put inside the Pandorica, followed by the entirety of reality being subjected to Ret-Gone by the explosion of the TARDIS.
 * And for the last few seconds of the episode, silence falls.
 * The death of Henry Blake in season three of M*A*S*H. There's a slow panning shot of everyone looking horrified and saddened after The Reveal.
 * In NCIS: LA, we get one of these following Dom's death.

Theatre

 * The musical Allegro has a silent scene (music but no dialogue or singing) following the death of Joe's mother as Joe, his friend and his father react to the sad news.

Video Games

 * In the end of the British campaign in Company of Heroes, there are close shots of the aftermath of the battle of Caen, accompanied by Celtic singing with strings and bagpipes.

Western Animation

 * In the Justice League episode "Hereafter," this is the reaction to Superman's apparent death. He's not actually dead, but none of the onlookers know that.

Real Life

 * Subversion: Academy Awards + moment of silence for Titanic victims + "That's enough of that, now let's all go party 'til dawn!" = James Cameron is a huge prick.