Mustaine's guest appearance for the concert - billed as "Symphony Interrupted" - at Copley Symphony Hall in San Diego, California saw him participate in a classical music program that included Wagner's "Ride Of The
Valkyries" from "Die Walk�re", Vivaldi's "Winter" from "The Four Seasons" and Dvorak's "Symphony No. 9" (the "New World" symphony).

On April 17 in Las Vegas, Mustaine and Megadeth will launch of a world tour in support of their latest album, "Super Collider"; the trek will see the band hit more than 25 countries across four continents.