Is Mr Sondheim having mobility issues? The segment started with him already seated. I hope it was just a time issue; even though he was the second guest, he got two segments which was great. Colbert's admiration for Sondheim is so evident. After his introduction, Colbert gave him a standing ovation & the audience did as well despite the fact that he was already sitting down & not walking to his seat. I was very excited by everything he had to say.