history: I was apprehensive a few weeks ago when I got on this rickety roller coaster. It was an old wooden one and kind of scary.  I went to a theme park recently and got on this roller coaster  Really! Did you have fun?  Not really. :( It didn't seem very safe.. it was a really old rickety_comma_ wooden one that looked like it was about to fall apart. 
current: Oh no! That sounds scary. Some of the rollercoasters can be very well built while others are very sketchy
next: Yeah I'm just glad I didn't die. Phew. 