Quite simply a ROCKING piece of stop motion by Ninja Moped (they used to call themselves Rymdreglage but for some reason decided it was too difficult to pronounce). Some of it almost looks fake. It's not. Keep watching to the end of the vid and they'll tell you how they did it.
In another thing they're working on, the Piano Project, they plan to build a giant crossbow and use it to shoot pianos into buildings, cars and trees and then film it at super HD. Sounds awesome.
They also do amazing stuff with Lego. Checkit.