Gregg breaks down and plays the "Purdie Shuffle," a groove made famous by legendary drummer Bernard "Pretty" Purdie which was also the inspiration for the late great Jeff Porcaro's performance on Toto’s hit song "Rosanna.” (The Purdie shuffle was also the inspiration for Led Zeppelin's "Fool in the Rain" shuffle groove played by the legendary John Bonham.) These grooves focus on shuffle-feel linear drumming and aim to provide a good feel that supports the song musically.