Roller coaster (also known as roller coaster) is a motorized amusement ride commonly found in amusement parks and theme parks. LaMarcus Adna Thompson was the first person to register roller coaster-related patent technology (January 20, 1865) and had manufactured dozens of roller coaster facilities, so he was known as "Father of Gravity". A basic roller coaster structure includes climbs, slides, and inversions. The track design does not necessarily have to be a complete loop. It can also be designed so that the car body moves back and forth on the track. Most roller coasters can accommodate 2, 4, or 6 people in each ride car, which are connected to each other using hooks, just like a train. Although roller coasters are scary, they are basically very safe facilities. The movie "Terminator 3" claimed that the accident rate of roller coasters is about 1 in 250 million, but in reality, the real number may be even lower. According to a survey by the U.S. Consumer Product Safety Commission (CPSC) and Six Flags, the fatality rate for riding roller coasters in 2001 was approximately 1 in 1.5 billion. This means that visitors are more likely to die while driving to an amusement park. Among steel roller coasters, the Steel Dragon 2000 in Nagashima Onsen Amusement Park in Japan is the longest roller coaster with a total length of 2,479 meters. The second place is The Ultimate in Lightwater Valley, UK, with a total length of 2,271 meters, and the third longest Millennium Force is located in Cedar Point Park, Ohio, USA