National Treasure

Recently, I was thinking about a cut between two scenes in National Treasure.  At ~37:29, there's an abrupt transition from Ian and his team sneaking into the basement of the National Archives building to the gala that's happening above.  I'd recognized (instinctively if not consciously) that the two scenes differed in their nature, look, and relative location (a serious robbery beginning in dimly lit tunnels beneath the building compared to a light-hearted party in a bright hall on an upper floor), but I realized that they're also distinguished by their sound.  In the scene with Ian and his team, the sort of techno soundtrack provides a tense feeling, but this is soon replaced by the elegance and sophistication of a Haydn string quartet.  Additionally, since the string quartet is being performed by an ensemble at the gala, it's diegetic, unlike the music in the first scene, which is merely part of the film's soundtrack.  Each pair of these qualities creates a contrast between the two scenes, and when they're combined, the effect is magnified, especially since they involve more than one sense.