Who: Norbert Sudhaus
Olympics: Munich 1972

While American Frank Shorter was leading the marathon, German student Norbert Sudhaus came into the stadium first and got wild applause from the crowd. The BBC announcer was shocked and described him as “Fresh as a buttercup” before realizing that the crowd had been duped by an impostor. Shorter got the gold medal, but not before the crowd was fooled by Sudhaus.