On the original Sullivan appearances, rather than training the camera above the waist, they probably would have just tilted the camera up to the ceiling. And turned the sound off. This would be the aboveground cooptation of John Cage's 4'33", (1952) and teenagers across the land would have whispered to each other, Did you see that?. Across the nation, in every town, girls would have started fainting and speaking in tongues when exposed to the spectacle of nothing in particular happening except the random coughing and tittering of fellow attendees at the concert hall, and guys with shaved heads and goatees would try to get in the gravy train by picking up their guitars and doing nothing for the length of a song--OK, I think I've milked that joke as far as it can go.