In sumo wrestling, the referee carries a knife so that, at least traditionally, he can ritually disembowel himself if he errs. (source)

In the late nineteenth century, the Duke of Beaufort discovered a game in India called "poona." Attempting to introduce the game into England, he found Englishmen unwilling to play a game called "poona." He renamed the game "badminton", after his estate in Somerset, and it caught on.