Continuing on theme of key moments and using change to draw the viewer in, have a look at this T-Mobile UK ad:
Note the use of the Dire Straits “I want my MTV” and how things change at the points where Mark Knopfler’s guitar kicks in at around 1:34. Then see the changes in the characters. Did you feel the tension building? Did you know a major change was coming with that music change? A well done ad in my opinion.