Unless you’re someone like my dad who listened to precious little beyond John Philip Sousa marches and ragtime, you’ve probably heard the song “Rosanna”, the grammy-winning first single from Toto’s 1982 album Toto IV. The tune peaked as high as Number 2 on the Billboard Hot 100 for five consecutive weeks, and it’s still played in heavy rotation on classic rock radio forty years after it was released. The foundation of the song, drummer Jeff Porcaro’s “Rosanna Shuffle,” is both notoriously difficult to play and probably the sickest beat in a rock song ever. I’ll play it for you and tell you why I think it is.