When I was going on a roller coaster, my heart began to panic. It started very slow going up into a high place.  Suddenly it stopped for a while.  Then it began going down really fast and around loops doing fast turns, going straight on high speed –  such a scary ride.  People were screaming and shouting all the way.  I found myself looking upside down on loops and into a straight track and then it stopped.  And I was glad to get off!