CHUCKSum 41's super heavy 2002 album, DOES THIS LOOK INFECTED?, was an exercise in speedy hardcore matched with thundering metal bombast, suggesting that the group might soon morph into a full fledged thrash band. While CHUCK does refine that style even further than its predecessor, the 2004 album also signals a growing musical curiosity. "Intro," the disc's aptly titled opening song, features tersely picked guitar lines that recall some of the darker