Mashups are so 2001, right? Now that every Serato-toting DJ has figured out how to drop T-Pain a cappellas on top of Steve Miller riffs, such shotgun weddings are about as surprising as "Walk This Way." Lucky for us, turntablist supreme DJ Z-Trip — who's made mashups his MO since his earliest demos — still has the ability to surprise. From his potential-lawsuit-every-30-seconds underground mixes to his cleared-samples-and-guest-vocalists 2005 major-label debut Shifting Gears, Z-Trip has always had an ear for what he calls "uneasy listening," in which Black Sabbath, Lyrics Born, and Rush all clamor for attention.