As a further illustration of just how much things have changed in the last thirty plus years, here's a clip of an untitled piece of psychedelic performance art from Jim Henson, who Johnny Carson introduces as "Jim Jenson" on The Tonight Show, ca 1974: [download mpeg video, 17 megs, or youtube it]
The music is Raymond Scott's Limbo, The Organized Mind, from the great 2-CD set, Manhattan Research Inc. As Parq put it, you can practically hear middle America collectively saying What the Fuck? Even Johnny shakes his head in awe. Or maybe it was regret. Thanks to Mickey Mephistopheles from the FMU Message Board.
UPDATE: Jeff of RaymondScott.com reports: Jim was performing the "mouth" and "eyes" live, but the film, including Henson's voice-over & Raymond Scott's soundtrack, was completed many years earlier, in 1967. The film's title is The Organized Mind, and the character's name is "Limbo."