How BORING to have Sean Hayes just sit there. It makes it appear as if they're trying to include him in another number of a show he's not in, rather than telling viewers "Hey! This actor that you recognize is in a Broadway show! Come see a famous face live in person!"
"The Spectacle has, indeed, an emotional attraction of its own, but, of all the parts, it is the least artistic, and connected least with the art of poetry. For the power of Tragedy, we may be sure, is felt even apart from representation and actors. Besides, the production of spectacular effects depends more on the art of the stage machinist than on that of the poet."
--Aristotle