Butting In (1974)
As David Niven introduces Best Picture presenter Elizabeth Taylor, a nude streaker dashes behind him flashing a peace sign. The man (later identified as Robert Opal) is apprehended and dragged to the pressroom for photos. Not to be upstaged, Niven quips, ''Probably the only laugh that man will ever get in his life is by stripping off and showing his shortcomings.''