Having alternated between making melodious music on the harmonica and napping, not to mention one failed attempt at smoking before he found himself face full of man-made fog, Robert found himself to be actually fairly comfortable in the little box of solitude. Sure Robert was hungry and he wasn't quite sure if there was a limited amount of air. Hm. Maybe he was dying right now. Awesome.
Then he heard a new sound coming from above him. Sounded like someone calling out to him. Maybe the elevator did have an emergency signal after all. "HELLO?" he called out in response.