To ensure that no matter how tall, how fast, or how scary an attraction really is, guests know that no one is really ever in danger. Thrill rides exploit this system—but they do it in controlled, intentional ways. This is why a well-designed thrill ride can be perfectly safe, and yet still feel utterly terrifying. At that moment, you really feel the dread about what is coming and know that there is nothing you can do to stop it. I love roller coasters and thrill rides.