Dr. Michael Nickens, an associate professor of music in George Mason University’s Reva and Sid Dewberry Family School of Music, tells Mason President Gregory Washington how he transforms from his mild-mannered persona into Doc Nix, the flamboyant leader of the Green Machine, the nation’s No. 1 pep band. The band isn’t a mechanical process, Nix says. There are times its members are collectively “exploring the universe in that moment. And those are the moments that feel like we have really accomplished something.” Actor Bill Murray is a fan of the band, and Nix is pretty good on the tuba.