“Wayne’s World” director Penelope Spheeris shares the secret to making a movie based on a “Saturday Night Live" sketch, discusses whether it's true Dana Carvey wanted to quit before filming started, and reveals whether or not the headbanging was improvised. Plus, get bonus stories about Alice Cooper and the late, great Chris Farley. It rocks.Learn more about your ad choices. Visit megaphone.fm/adchoices