People enjoy being challenged

There are four different aspects to sensation-seeking:

• Thrill-and adventure-seeking, which has to do with a high adrenaline experience.
• Experience-seeking. People who like unusual experiences.
• Disinhibition. People who might like to scream on a rollercoaster and give in to their emotions.
• Resistance to boredom.

Generally, people that go out to amusement parks want to be challenged and taken to the edge of danger, but ultimately still want to be safe.