The three-hour electric prescription for your funky ills.
Someone just wrote a whole book about this show which is now a historic recording in the Library of Congress. I think Ithaca still observes May 8th as a holiday and has some kind of commemoration each year.
Most people know the Betty Board recording (available here) off the soundboard, but this YouTube seems to be a fairly good quality audience tape, so plenty of crowd noise and clapping. A different way of listening to something that might be as familiar as an old winter coat.
Trivia: it snowed during the show even though it was May.