Robert Opel
Robert Opel (23 October 1939 – 7 July 1979) was a photographer and art gallery owner most famous as the man who streaked during the 46th Academy Awards in 1974. He sneaked backstage posing as a journalist (he had worked as a photographer for the well-known LGBT publication The Advocate, shortly before) and ran naked past David Niven flashing a peace sign while Niven was introducing Elizabeth Taylor.
Unfazed, Niven turned to the audience and quipped, "Well, ladies and gentlemen, that was almost bound to happen... But isn't it fascinating to think that probably the only laugh that man will ever get in his life is by stripping off and showing his shortcomings?"
Later, some evidence arose suggesting that Opel's appearance was facilitated by the show's producer Jack Haley, Jr. as a stunt. Robert Metzler, the show's business manager, believed that the incident had been planned in some way. He said that, during the dress rehearsal, Niven had asked Metzler's wife to borrow a pen so he could write down the famous ad-lib. Opel apparently had to cut through an expensive seamless background curtain in order to reach the stage.