There is something about improv in this article, but I don’t know what it is exactly.
http://www.nytimes.com/2008/03/02/magazine/02wwln-medium-t.html?ex=1362027600&en=364a6d295a1964d6&ei=5124&partner=permalink&exprod=permalink
Something about movies before VHS, when you would see them only once or at least only in the theater. And how there would be so much repetition in the movies, esp great ones, like Tootsie.