The thrill of performing on stage without a script or a score is undeniable. This episode of Spark gives you that taste of excitement and dread of winging it in front of an audience. Braving this high-wire theatrical walk, Rafe Chase, Tim Orr and Stephen Kearin of 3 For All turn suggestions from the audience into narrative stories that promise to amaze and amuse. Then we join the Rova Saxophone Quartet, a vanguard group 25 years in the making, as they improvise cutting-edge music art for series of musical pieces inspired by soprano saxophone legend Steve Lacy. Finally, we drop in on world-renowned master of improv Ruth Zaporah as she and her students take you through the sweat of her very ownAction Theater method of improvisation.