person A: I went to a theme park recently and got on this roller coaster 
person B: Really! Did you have fun? 
person A: 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. 
person B: Oh no! That sounds scary. Some of the rollercoasters can be very well built while others are very sketchy
person A: Yeah I'm just glad I didn't die. Phew. 