While soft-spoken in conversations and lectures, Isadore Rudnick could shout when teaching acoustics with demonstrations. At a special, auditorium stage, video-taped plenary session of the Fall 1980 meeting of the Acoustical Society of America, Izzy presented 90 min of spectacular acoustic demonstrations. The demonstrations ranged from simple ones common to acoustics classes to ones that filled the stage and involved elaborate equipment. This talk will be followed by a viewing of Izzy's plenary session video. It is hard to imagine that any acoustician would not find something of interest in, and indeed learn something from, this video. For those who wish to study Izzy's demonstrations further or present the material in a classroom, the video is available for ordering as advertised in the Journal of the Acoustical Society of America.