Bush isn't as bad in terms of finishing sentences and making faces. But he sure seems defensive.
I don't get the point of having a live audience there if they're not allowed to actually talk to the candidates. People could submit questions and the moderator could read them and you'd have the same thing.
I always liked the idea of ordinary citizens being able to ask tough questions of elected officials. I think that's a great example of what separates America from so many nations where the leadership never has to answer to anyone. And it would really be impressive if those citizens weren't forbidden to deviate from their pre-approved questions or to ask follow-ups.