02:53 PM: Hey, that sounds like Sabbath! There's someone in this building who likes Sabbath! (goes near window). Hmm, guess I was just hearing things.
02:56 PM: Hey hey that is definitely Led Zeppelin! Who's playing... Oh well I must be imagining it.
03:05 PM: Surely, that's Metallica! Those rhythms, the drumming, the bass... Ah crap, why does the music keep stopping?
03:25 PM: Wow, he's playing guitar and it sounds AMAZING! Superb riffs! Maybe I could form a band with him and... It's coming out of this window... Oh...
It's construction machinery.
Moral of the story : Maybe going back to Boyzone and 'NSync once in a while is not all that bad an idea...