In professional wrestling, the heel turn is an art form that, if executed properly, allows a baby face to completely re-invigorate his character, and become a successful bad guy. A heel turn can occur for a number of reasons, like a good guy's act running stale, a character taking on a new motivation, or as a shocking surprise that swerves the audience. A well executed heel turn should leave the audience stunned, and desperate to see this new heel get his just deserts. On the other hand, a poorly executed heel turn can leave the audience confused, wondering why someone that they once loved (or someone they can't see as a rule breaker) all of a sudden has to resort to devious tactics to win matches. When a heel continues to receive cheers from fans, or even worse, receives silence, the heel turn has not been successful. Without further ado, here are five heel turns that did work, and five that did not...