By Jonathan McNamara Better Than: Spinal Tap. Sure, this animated band owes a lot to its comedic predecessor, but sheer technical skill from the band that makes Nathan Explosion, Pickles the drummer and all the rest of these rogue rockers live puts Dethklok a few notches higher. See more shots from the show in our slide show Dethklok Invades Marquee Theater It’s not uncommon for thousands if not millions of people to die during a single song at a Dethklok show. As lead singer Nathan Explosion tosses gravel around his vocal chords leading the rest of his brutal band down a death metal-paved road straight to Hell, an awakened demon 50 stories high and thirsty for blood is actually quite likely to appear and satiate its bloodlust on the fans. I wasn’t alone. Dethfans were lined up out the door and down Mill Avenue in the sweltering afternoon sun waiting to get in. The multitude of fans was hardly surprising considering what Dethklok has managed to accomplish. This animated band’s cartoon show Metalocalypse on Cartoon Network’s Adult Swim has already run for two seasons. An album based on songs from the show called “Dethalbum” debuted at #21 on the Billboard 200 chart, making it the highest charting death metal album of all time. How could I let fear of my own mortality keeping me from seeing a band that has accomplished so much without actually even existing? Virtual or not, I had to see this band arrogant enough to call themselves ...