Three-legged Wonder

"People are occastionally born with extra toes or fingers. Frank Lentini was born with a whole extra leg projecting from his back.
Frank always insisted that the extra limb didn't bother him in the least. However, he couldn't walk on it because it was too high up. 'But he could use it as a stool,' said Harry Lewiston, who worked with him in the circus. 'He was the only man I ever knew of who could sit down any time, any place, without bothering to drag up a chair.' The leg was functional to such a degree, Frank could even kick a ball with it, which provided a good tag for his part of the show." -Very Special People: The Struggles, Loves, and Triumphs of Human Oddities by Frederick Drimmer.