Any Metalocalypse fans out there?

I'm trying to figure out what font they use... its unbelievably metal. Found a couple that are close but not quite, House's Blaktur and P22's Canterbury among them... both are also pretty metal.

An example can be found here:
http://www.axelmusic.com/resources/covers/back/053939797725.jpg

Thanks rockers
Go Font and Die.