When I saw The Producers with Nathan and Matthew, right after the "Conga" scene, Matthew could not for the life of him get the boa to stay on the coatrack. The poor thing tried like 5 times but everytime he walked away it would fall again. Nathan was just starting his "It's tough being a Broadway producer..." looked back at Matthew and added "you need to know how to work a boa!" It was great.
During the same show, he went "CLEAR!" and put the phone to his chest, pretending to shock himself, after Matthew asked "How much money do we put in?" I've heard he did this a few times, but it's hilarious nonetheless.
He also threw one of the rejected scripts over the set's wall which was just funny - I've never seen anyone do that before.
During my last trip to the show, last Friday, Richard Kind was Max and during the "Intermission!" part of Betrayed went, "You know they were saving this cell for Michael Jackson." The audience went wild!
~Jessica
"If you start from a place of joy and charm, you can get away with a lot in the second act. It may be that that's my life. I'm not sure."
~Roger Bart