roller coasters are popular all over the world. In fact some people will wait in line for hours to ride a roller coaster. At fujikyu highiand Park fujiyoshida japan yosuke kawase waited in line for four and a half hours to ride dodonpa the fastest roller coaster in the world. Yosuke says i love roller coaster because of the thrill and the speed. I don't mind waiting in line john lvers lives thousands of miles away from yosuke and he loves roller coaster too. Bat he hates to wait in line. So he built a roller coaster in his backyard john lives in bruceville indaina in the u.s. He is an engineer. He and his wife sharon have two daughters and four grandchildren . John built his roller coaster the blue flash a few years ago. It is 20 feet about six meters high. It travels over john's barn and around an elm tree