After famously playing Johnny Lawrence in the Karate Kid, actor William Zabka was forever cast as the heel. At the same time, Zabka took up learning martial arts, earning an advanced belt in Tang Soo Do, on top of his already impressive wrestling skills. He knew that the world would never accept him as a hero, but wanted to do good in the world. Unable to come up with a way to reform his reputation, Zabka donned an update Halloween costume and took to the streets to play the part Hollywood would never give him: The hero.
http://i.imgur.com/zF36GGQ.jpg
Included for reference.