When Mike and Pete Campbell perform their mind-boggling, hypnotic prog-metal, it's a difficult phenomenon to ignore. Not only does the complexity of the musical arrangements crack open heads like calculus on acid but it's executed with joy and a flair so furious that audience members are often too happily captivated to notice that their brains are being rewired. Indeed, it could be the case that the twin-brother duo are up to something secretive and scientific as Mike does finger acrobatics up and down the neck of his ten-string guitar, smiling and shouting with excitement while Pete enters into a bug-eyed shamanic trance while working his 30-piece drum kit — featuring a razor-sharp saw blade and other oddities — in impossible ways. The nonstop, 45-minute ride may feature a salsa bit, a trip through fiery hell, and an extended homage to Zelda. Or maybe none of the above. The duo is constantly at work composing new, brilliantly orchestrated sets for their live shows. It's what they do. And it's quite puzzling, in a wonderful way.