CBR TV's Jonah Weiland welcomed voice actors Jason O'Mara (Batman), Stuart Allan (Damian Wayne) and Sean Maher (Nightwing) to the CBR Speakeasy above WonderCon 2015 in Anaheim to discuss their work on DC/Warner Bros. Animation's upcoming "Batman Vs. Robin" animated feature. The movie, a direct-to-Blu-ray sequel to 2014's "Son of Batman" scheduled for release on April 14, loosely adapts Scott Snyder & Greg Capullo's "Court of Owls" storyline from DC Comics' "Batman" ongoing series.

WC15: "Batman vs. Robin" Cast and Creative Team Panel

In this clip, the actors discuss breaking up traditional dialogue voice acting with the grunting and other noises needed to bring the action sequences to life, why it's the only time they've ever welcomed line readings, and how acting out fight scenes sometimes leads to knocked over furniture and even the occasional injury.