It's national roller coaster day! On August 16th, fans from all over the world celebrate the sake of the thrill-inducing experience. Below are some quick, fun facts about roller coasters for you to share with friends while waiting in line for a few hours.Sarah Ackerman/FlickrRoller Coaster Philosophy/FlickrRiding his own coasters only once or twice ever, he was once quoted as saying "I've ridden enough to know what they are like."