I'm thinking this happened in '75 or '76. Don Rickles is doing his usual schtick and breaks into a song called "I'm a Nice Guy." Then Mr. I Shot Shane, Jack Palance, walks in to take a verse. Then sexist tennis player Bobby Riggs. Then tyrannical director Otto Preminger. And then it gets weird.
Seriously, was there something in the flouride in the water back then?