It's official. I've discovered the best cartoon ever. That's right, even better than He-Man, Thundercats, or (gasp!) even the Smurfs. It's called Metalocalypse, airing on Adult Swim on the Cartoon Network.
Metalocalypse follows the exploits of the part-American/part-Scandinavian metal band Dethklok. They enjoy a popularity level unheard of in reality. They are so popular that the fans will do anything their songs tell them, even if it could mean death. ... People love Dethklok's concerts so much that they will sign "pain waivers" at the entrance, signing their lives away and releasing the band from legal liability in the extremely likely event of an audience member being killed or dismembered in some manner, often by one of the deadly contraptions the band has set up beforehand. ... The band members, in a parody of the posturing of real-life metal bands, show an obsession with "brutality" and "metal-ness", often choosing to do something or not based on how "metal" they believe it to be.
For an example of the awesomeness of this cartoon, check out Episode 17-2 - Dethklown, where Dethklok hangs out with a David Lee Roth-esque metal-loving clown named Dr. Rockso. Included in this clip is a music video for "I'm Just a Heavy Metal Clown," appearing at about the 3 minute mark. As Dr. Rockso says, the video was banned from MTV because "you could see his junk through his jumpsuit." (If you manage to watch the entire clip and want to understand what you just saw, here is the first half of the episode).