About the below photographs: On the left: TOP THRILL DRAGSTER, a roller coaster at the Cedar Point Amusement Park in Sandusky, OH. Peaking at 424 feet, it shoots up a 90-degree point at a peak speed of 128 mph, then of course, you come down 420 feet. The ride takes 17 seconds from launch to arrival at the exit platform. Only  one hill. That's all you need. On the right: The Hoover Tower scaled to give you a full understanding of how big this thing is. NOTE: I put this up here because I'm still shocked that my 12 year old went on this willingly. On the Left: d research groups: