Yesterday, the iTunes shuffle mode came up with a segue that wouldn't have occurred to me. While hearing the Mason Williams tune, "Classical Gas," I thought, "This is an ideal pop instrumental for light Classical fans. How will iTunes match or not match its energy? iTunes responded with the fifth movement, Fandango Asturiano, of Rimsky-Korsakov's "Cappriccio Espagnol." The Philadelphia Orchestra, under Eugene Ormandy's baton, rose to the occasion, grabbing my attention with a short, brassy intro and an appealing melody for woodwinds. It's as if iTunes was saying, "Now that you're revved up from the energy of a cross-categorical pop/semi-Classical piece, let's give you a taste of the real thing."