In this interview shot backstage at SXSW, rapper Wiz Khalifa talks to Rolling Stone about High School, the stoner comedy he's making with Snoop Dogg, and the movie's soundtrack, which will be a full-album collaboration between the two rappers. "It's about pot, of course," the rapper says. "But it's also a spin-off of us being cool in the industry, and smoking a lot of weed."