Thor - it's really really really easy. There is a youtube video documenting the easiest way to do Thor's break off. You can literally just stand still and chuck spear to your hearts content if you follow the right protocol.
Glas - I'm not sure it's possible to break off solo. Most reports are saying that it takes 3 differe people with chains. The people who say differently, appear to be trolls.
Hell if you're on East, I can probably teach you how to do it. Means that I'll have to get yet another dummy character up to doing Thor.