Professional wrestling is a cruel and unusual form of entertainment. For better or worse, many people do not consider it to be a sport, but paradoxically, competitors put their bodies and lives on the line every night for the fans. While severe injuries are rare, they do indeed happen. In some cases, these injuries can lead to the end of a wrestlers career. Furthermore, the behind-the-scenes drama of sports entertainment can also lead to the sudden end of a wrestlers in-ring tenure. Many stars have simply given up and walked away from the sport, choosing not to deal with the chaotic and cruel nature of the business. In most cases, these decisions happened suddenly, leaving the competitor -- and their fans -- with a dissatisfying career conclusion. With CM Punks recent departure still fresh in everyones mind, well take a look at his sudden exit, as well as some other superstars whose careers came to an unsatisfactory end. Whether because of severe injury or because of personal strife, the following ten wrestlers were forced to walk away from wrestling for good. So, join us as we take a look at ten wrestlers whose in-ring careers came to a swift and shocking end.