Here, minus the first three minutes or so, is a video of the Cartoon Voices panel we did at WonderCon last Saturday to a full house. The actors were, going from left to right on the dais: Gregg Berger, Julie Nathanson, John Mariano, Sumalee Montano, Bob Joles and Kathy Garver. The video starts with Gregg telling what he's done and demonstrating some of his most famous voices (you missed a few, including Grimlock) and then he's followed by the other five doing their greatest hits.
Around the thirty minute mark, we commence a cold reading of the story of "Cinderella" with the actors reading lines they hadn't seen before and improvising the hell out of what was on the paper. We do this often at WonderCon and Comic-Con. I get five or six actors, stick them with a rather bland script and turn them loose.
I don't think some folks in the audience realize that much of the joy comes from them not sticking to the lines as written…although this particular cast impressed me for getting some pretty big laughs with clever readings of unaltered dialogue. But there's a lot of ad-libbing in there, too and they get the credit for all the funny. My big achievement was getting the panel to end at exactly the right minute…