Roller coaster phobia is a colloquial and slang term describing an individual's fear of roller coasters and other rides which involve excessive heights, restraints or g-forces on the body. While roller coasters are a popular theme park attraction, certain people feel nauseated, afraid, dizzy, or unsafe when riding roller coasters. In many cases, this fear is related to other phobias - such as acrophobia, claustrophobia or emetophobia - a condition like vertigo, or to a traumatic event. While not an officially recognized phobia, some cases have been treated successfully with a specialized therapy program.
Answer this question, making sure that the answer is supported by the text: is it ok to be afraid of roller coasters?

Options are:
[1]. no;
[2]. yes;
[2].