Many jokes revolve around the game of golf, either as a setting for an otherwise generic punchline or as the target of a barb. Mark Twain's definition of golf was "a good walk spoiled." John McEnroe asked rhetorically, in reference to whether golf is a sport, "I thought a sport was where you had to run or something." Winston Churchill once described golf as "...a game whose aim is to hit a very small ball into a even smaller hole, with weapons singularly ill-designed for the purpose." Some business people like to say, "The worst day on the golf course is better than the best day at work." It is also noted that J.R.R. Tolkien said that golf originated from hobbits, after Bullroarer Took knocked the goblin king Golfimbul's head off with a wooden club, sending it down a rabbit hole thus winning the battle and inventing golf at the same time. During a stand up comedy act, Robin Williams did an entire set related to the invention of the sport by drunk Scots.