Adrian Grenier Practices Air Drumming Daily

Real-life drummer Adrian Grenier explains the merits of air drumming for Sundance flick "Adventures of Power." Friend and co-star Ari Gold

gives us the inside scoop on what it's like to be named Ari Gold. Hint: It can be hazardous to your health!

See our complete coverage of the 2008 Sundance Film Festival -- including breaking news, celebrity interviews, red carpet photos, movie clips and tons more.