Example of the three uses of sound

I don't remember how I ran across this scene; it is a bit corny but it shows the three uses of sound in film - dialogue, sound effects, and music - all of which seem to play pivotal roles in this clip. Around the 2:20 mark, the music will change to include dissonant notes to create unease. The Psycho clip also uses dissonance to create a sense of uneasiness during the stabbing scene but the musical stylings are different.

Opening scene of X-Men 2 (2003)