Quest, grind.. kill murlocs, kill gnomes and dream about it.
This video got started when I got a mail in my YouTube inbox, which had a link to an mp3 and a request to machinimate it.
I listened to the mp3 and instantly agreed - here is the end result!
But that was not all. I asked people in WoW EU (and with help in US) forums to send me a WoW model viewer file of their gnome to die in this machinima. I got over 80 gnomes but only a handful were used.