text: Kaufman explained this incident on the February 17, 1982, episode of Late Night with David Letterman. He said that he had apologized because he disagreed with how Presley was portrayed in the sketch, which involved Presley instructing two young women from his audience to visit him backstage, where they would wrestle topless in mud. Kaufman said that he had initially declined to perform the sketch but was pressured into it. He also alleged that SNL staff threatened to ruin his reputation in the industry if he did not perform the sketch.
  The sketch was a reference to an incident alleged by Albert Goldman's controversial 1981 biography of Presley. Critics of the biography derided its scornful tone and charged that it was intended as an exposé. Kaufman said that Goldman threatened to sue him after the episode aired, but Kaufman challenged Goldman to a public debate on Presley's character.
  Carnegie Hall show
  At the beginning of an April 1979 performance at New York's Carnegie Hall, Kaufman invited his "grandmother" to watch the show from a chair that he had placed at the side of the stage. At the end of the show, she stood, removed her mask, and revealed to the audience that she was actually comedian Robin Williams.
  Kaufman also had an elderly woman (Eleanor Cody Gould) pretend to have a heart attack and die on stage, after which he reappeared on stage wearing a Native American headdress and performing a dance over her body, "reviving" her.
  Kaufman ended the show by taking the entire audience, in 24 buses, for milk and cookies. He invited anyone interested to meet him on the Staten Island Ferry the next morning, where the show continued.