The Most Extreme Winter Olympic Events

What are the most extreme Winter Olympic sports? The Winter Games are mostly snow and ice sports distinguishable by their steep hills, sharp skates, and flying-through-the-air-type jumps & tricks. And best of all, the competitors are among the best athletes in the whole wide world at the peak of their physical excellence. It's like the X Games, but a much bigger deal, broadcast to a much bigger audience. Extreme sports at the Olympics are some of the most fun to watch and rate from our armchairs at home. But which Winter events are the most extreme? That defends on your definition, because it's up for debate.