Glass theme

Did anyone notice all the times glass was broken (glass bottles falling, glass needles broken) and how many times someone fell or broke through glass (doctor bursts through glass door to escape, black girl's boyfriend falling through glass shower door, evil surgeon falling through glass table in the end)?

Also, did anyone notice the crazy end credits music? It starts with a 30 second clip of some ridiculous rap crap and midway through a lyric it fades over to the film's score? It was pretty funny and irritating (not really as irritating since the song sucked).