5. Rock Fishing: Unless you're a fish, how can fishing be one of the world's most dangerous sports? Rock fishing involves casting【投,拋】 a line into the ocean from the shoreline.

People often forget about the tides and are swept away【一掃而空】 or are dragged【拖曳】 underwater by massive waves. In 2001, 15 people in Australia died while rock fishing.

6. Bull Riding: Jump on a raging【狂怒的】 bull who hates your guts【勇氣】 and try to hang on. That's the game of bull riding. Some of the bulls weigh over 2000 pounds and can throw a rider off in a split second【瞬間】—and may even stomp【重踏】 on the rider afterwards. Riders suffer broken bones, punctured【刺穿】 lungs and even death.

7. Supercross: Athletes fly in the air on a motorcycle while doing backflips【後空翻】, taking their hands off the handlebars and doing other death-defying stunts【特技】.

8. Solo Yacht Racing: In a race around the world, sailors encounter waves, sharks, hurricanes and even pirates. The nearest help can be hundreds of miles away and racers have no control over the conditions they run into. With no one nearby to help them out, racers can lose the race and their lives.

9. Street Luging【坐在平底雪橇裏滑雪】: Highly modified【改良的】 skateboards are used to race down a hill at speeds of up to 80 miles per hour. The pioneers of this sport originally raced down hills in the middle of traffic which made it even more risky. There are now special luges and equipment for the sport which make it much safer. But hey, you're still hitting pavement when you crash.