There are only three sports : bullfighting, motor racing, and mountaineering. All the rest are merely games. " Hemingway's suggestion is that the only difference between sports and games is danger. For many extreme sports,danger is also an important feature. The problem is that extreme sports take this idea too far. Extreme sports are not taught in school. There are usually no proper lessons or coaches. Because of this, many people get hurt or even killed doing these dangerous sports