The percentage drop in mountain-bike-related injuries requiring emergency-room visits, from a high of 23,177 in 1995 to 10,267 in 2007, the lowest on record, according to a new study. This despite the fact that some 50 million people still participate in the sport each year, according to the Outdoor Industry Foundation. The reason for the drop? The most common theory is that better technologies like disc brakes and dual suspension give riders greater control over their bikes. One more reason to throw down for a state-of-the-art ride.