Before a big explosion, there is a very short buildup towards the explosion, this is done more for the awe effect and usually doesn't actually have any meaning or explanation, audible and visible to the viewer, but not necessarily a part of the universe. If a bomb literally needs to build up power before it explodes then it probably isn't a part of this trope, especially not if it takes a while. (though it could be)

Often only takes a second, before the big boom, you will hear a very soft sucking sound, or a warping sound. In some more exotic examples, the sound will temporarily disappear. Sometimes accompanied by a PreExplosionGlow. Or a visible ripple and warping effect in the surroundings or the bomb will be shown SuckingInLines.

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!!Examples:

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[[folder: Film ]]

* In one of the ''StarWars'' prequels, Jango Fett uses "seismic charges" against Obi-Wan. Before they explode, there is a second of complete silence. Even the [[SpaceIsNoisy audible silence of space]] stops for a moment.
* Krypton exploding in ''SupermanReturns'' uses this effect.
* ''Film/TheMatrix'' is a heavy user of this trope. [[JustifiedTrope Justified]] to some extent as a side-effect of the Matrix's processors being unable to keep up with the unanticipated actions of the heroes.
** In the first movie, the glass warped visibly and audibly when the helicopter crashed into the building.
** There was a short silence before the EMP went off.
** In the second movie, warping effects when Neo exited the bomb wired level with all the doors.
** Also when the power plant was blown up.
* In ''TheLordOfTheRings'':The Return Of The King, this is heard before the big green bolt of garrison-light bursts out of Minas Morgul towards the sky.
* ''[[{{Terminator}} Terminator 2]]'' had the dream sequence where Sarah Connor imagines herself getting killed by a nuclear weapon fired by Skynet: First there is a blinding light and a heat wave, causing the everything to catch fire. Then comes the shockwave with accompanying sound and mushroom cloud, which flattens buildings, throws cars around, uproots trees and causes the scarred remains of people to scatter into the air like leaves.
* ''Film/{{Watchmen}}'' uses this with [[spoiler:the Dr. Manhattan bombs,]] where the sphere of AppliedPhlebotinum shrinks into nothingness and is followed by the blast a moment of silence later.

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[[folder: Literature ]]

* ''Literature/TheHitchhikersGuideToTheGalaxy1'': "There was a terrible ghastly silence. [[EarthShatteringKaboom There was a terrible ghastly noise.]] There was a terrible ghastly silence."

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[[folder: Live Action TV ]]

* ''Franchise/StarTrek'' is also a big offender. A variety of effects are used for different explosions.

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[[folder: Videogames ]]

* When Tyreal blows up the World Stone in the epilogue of ''[[VideoGame/{{Diablo}} Diablo II: Lord of Destruction]]'', a warping sound can be heard before the stone goes boom.
** In fact, this effect is tripled:
*** There is a moment of silence after Tyreal charges up the sword (and a slowmotion effect when he throws it) that reaches its pinnacle when the sword enters the stone. Then the dimensions around the stone start to ripple.
*** The stone slowly disintegrates, and as it reaches its ends, it builds up to a final explosion, this explosion is preluded by the now familiar pre-explosion warping sound.
*** But then it turns out that there is a second, even louder explosion, that comes after a softer explosion, the softer explosion thus itself becomes the pre-explosion warp.
* Also present in ''{{Halo 3}}''. When a Covenant vehicle is destroyed (except for Brute manufactured ones) it will explode once then almost invariably produce a strange whine and explode again. This is justified as the vehicle's plasma coil going critical.
* The fate of the evil space ship in the finale of ''EliteBeatAgents''.
* ''StarFox64'' has a remarkable ''numerical'' [[http://www.youtube.com/watch?v=AZeB21sTFdg example]] when unlocking the hard path from Macbeth.

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[[folder: Web Original ]]

* During missions for the ''ProtectorsOfThePlotContinuum'', Canon Analysis Devices that are exposed to [[ReadingsAreOffTheScale too much]] [[OutOfCharacter OOCness]] will usually display gibberish before [[ExplosiveInstrumentation burning out]].

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[[folder: Western Animation ]]

* In ''{{Titan AE}}'' the Drej PlanetKiller first turns on a targeting/focusing beam, then hits the planet with an energy burst, causing shockwaves to ripple around the planet surface while the seas boil and the continents burn, and finally [[EarthShatteringKaboom the entire planet erupts]] like a volcano, shattering it to tectonic-plate-sized pieces.

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