From the archives of the New Yorker comes an article by E.B. White on an early demonstration of television: "...and finally a telecast moving picture of television. This was where we began to crack up nervously. Try and appreciate our situation: we were in a dark room looking into a television set at a television set which was showing a picture of a moving picture."
I'm trying to appreciate the mind-bending experienced by that audience, but in the postmodern rip-mix-burn world I live in, the above sounds perfectly normal.