"Green Day bassist Mike "Dirnt" Pritchard earned his nickname by treating--or tormenting--his high school peers with bass jams that would make any proper headbanger proud. Nearly 25 years after forming Green Day, Dirnt is still doin' it. We talk tone and technique with the punk-pop powerhouse as the band preps to release the last installment of its trio of new albums, ¡Uno!, ¡Dos!, and ¡Tré!."