Good word, or: What Would Thurgood Do

"[Thurgood] Marshall had many similar stories of putting people on. A favorite of his involved unsuspecting tourists who mistakenly entered the Justices' private elevator. Finding a lone black man standing there, they said, 'First floor please.' 'Yowsa, yowsa,' Marshall responded as he pretended to operate the automated elevator and held the door for the tourists as they left. Marshall regularly recounted the story, noting the tourists' puzzlement and then confusion as they watched him walk off, and later realized who he was."

-- Bob Woodward and Scott Armstrong, The Brethren: Inside the Supreme Court