Mountain biking, snowboarding, surfing, motocross, snowmobiling, downhill skiing and skateboarding are fun, largely because they can be wickedawesomefast. They are also, according to research conducted at the department of orthopaedic surgery at Western Michigan University School of Medicine, wickedawesomedangerous. In fact, they are sufficiently wickedawesomedangerous to have caused 4 million injuries since 2000, and to now cause more than 40,000 head and neck injuries a year. HealthDay reports on the Michigan conclusions, which are based on information collected by the National Electronic Injury Surveillance System between 2000 and 2011. The researchers found that one in every 10 injuries were to the head or neck, with head injuries accounting for 87 percent of head and neck injuries and neck injuries accounting for 17 percent. What’s the most dangerous extreme sport? Skateboarding, which had more than 129,000 injuries. Snowboarding was linked to more than 97,000 head or neck injuries, and skiing ranked third on the head/neck injury list,m with more than 83,000 cases. Read more from HealthDay.