I don't think there is a forum like this and even if there was it would've been a long time ago
So the rules are describe an experience of a roller coaster while not riding it. For me one I'll always remember is going to Hershey for the christmas lights while lightning racer was being built. There was a little snow on the ground and I remember being just awe struck at the construction while in the car leaving the park. This moment had a very big part in my enthusiasm of roller coasters