Bill McClintock is back doing what he does best, and “Rockanoid” is a glorious pileup. The mashup maestro fuses Black Sabbath’s “Paranoid” with Queen’s “We Will Rock You,” then keeps stacking, pulling in Metallica’s “Sad But True,” Def Leppard’s “Rock of Ages,” Dio’s “We Rock,” a double shot of AC/DC in “Let There Be Rock” and “For Those About to Rock,” Judas Priest’s “Rock Hard Ride Free,” Ozzy Osbourne’s “Rock ‘n’ Roll Rebel,” Pat Benatar’s “Heartbreaker” and Helix’s “Rock You.” It shouldn’t hold together, and that’s the fun of it, a teetering tower of riffs that somehow locks into one headbanging whole. McClintock credits the chaos to running out of his ADHD meds, and honestly, the results speak for themselves.