They get a hard dick by making the audio track more dynamic so that conversations are low and when there are explosions or helicopters or whatever the fuck the audio is slammed out. So if you watch it at home you have to crank it up to hear wtf they are saying and then an action scene happens and blows your speakers and ear drums. If you're watching at someone else's place after they go to bed it wakes them up. And you have to keep adjusting the volume. Fuck you Hollywood. Hollyshit.