<human>: Summarize the given text in a few sentences.

Roller Coasters are fun. I like them all and will ride any type of roller coaster. No place on earth though has better roller coasters then Cedar Point. Every year, my church youth-group goes to Cedar Point. It is a fun time, and it is well worth it. My best friend is going for the first time, so we try to hit all the rides that we wanted him to ride.
The one ride that we wanted to do was Millennium Force. For those of you who have never been to Cedar Point or heard about this ride, it is considered to be one of the greatest roller coasters in the world, winning awards every year. So me and my three buddies hop in line. The first-timer friend is farther up in the line, and it is about a 1.5 hour wait. About 3/4th of the way through, a thought occured in my head.
For those of you who have never been on Millenium Force, your first time up is a bit freaky. Most of the time on your first ride, you usually black-out when you reach the top of the first hill (Actually, black-out is not really the way to describe, imagine the feeling you  get standing up too fast and multiply that by 100). So my first-timer friend will probably have that happen to him; it happened to me, my girlfriend, and my brother on their first time. So, right when we pass him in the line, I reach over and say;
"Hey, make sure you don't black-out on the top".
After that, I looked back, and saw everyone who heard me with a panic face on. When we pass my friend again in the line, he then informs me that he wants to get OUT of the line and sit down because he "Was not feeling well to ride it". So the poor bastard sat down and waited for his buddies to ride the coaster without him.
<bot>: I warned my friend about something that happens the first time you ride a certain coaster, scared a lot of people in line, and possibly made him not want to ride this coaster.