"Like, hip-hop," Mumford says with a grin. "We really want to rap. We've just got so much to say – saying it through a melody doesn't really work for me. We've been talking with Jay-Z about it, you know. It's gonna be a fresh experience for our band." Does the band rap in the practice room? "Yeah," Mumford says. "We're like, 'Motherfucker!'"