METALLICA bassist Robert Trujillo once again joined RODRIGO Y GABRIELA — the dynamic Mexican duo who became international world-music superstars with their self-titled album of aggressive acoustic guitars and irresistible Latin rhythms — on stage on August 17 at the Red Rocks Amphitheater in Morrison, Colorado to perform a medley of METALLICA covers. Fan-filmed video footage of his appearance can be seen below.Natives of Mexico City, Rodrigo Sanchez and Gabriela Quintero began their careers as members of TIERRA ACIDA, a heavy metal band which played on the city's underground gig circuit for seven years. "Like a lot of Mexican youth, we were heavily influenced by American metal bands — METALLICA, MEGADETH, PANTERA, and also SEPULTURA," Gabriela explained. "It was a full band, very loud, and for vocals, Rodrigo would just scream. We played this way for seven years." Asked in a 2010 interview if RODRIGO Y GABRIELA's metal connections were fading, Rodrigo said: "No, it's growing, actually. You go to our shows and you see a lot of metalheads. It was great to have the recognition from the kings, from METALLICA themselves, to be in touch with them and having the opportunity to jam with Robert pretty often. It's great, because that opened the door for a lot of metalheads to understand that we come from there. It's clear for the people that we love metal."