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Andy Kaufman vs. Jerry 'The King' Lawler
The stunt: Kaufman wore a neck brace for months after he and professional wrestler Lawler famously feuded during a 1982 episode of "Late Night With David Letterman."
Did it work? Even though Kaufman had duped the public before -- famously, on the variety series "Fridays" -- Kaufman's injury did the trick again. His feud with Lawler, as well as their wrestling matches, were revealed to have been staged between the real-life friends.