I saw John Stewart doing stand-up in Rochester back in the mid-00s. Rochester has a relatively huge deaf population because of the NTID, so the show had an interpreter but it also had closed captioning on some projection screens. Stewart spent ten minutes mumbling as fast as he could so he could comment on how well the transcriptionist was doing.

It was very funny for the people who could hear him, but I imagine the deaf people were much less amused.