Roller coaster

Behemoth at Wonderland in Toronto, Canada

 The most extreme thing I've ever done is ride a roller coaster. When I was high school student, I went to Tokyo Disneyland on a school trip and I tried to ride the roller coasters there for the first time. I was norvous and excited befor I rode on it. After I did, I thought it was fun but I was a little scared. I thought that I really wanted to try many roller coasters at that time.
 However, when I became twenty, I became unable to ride on roller coasters. I'm very scared to try it so, I won't try to ride it even though I like to go to amusement parks.
 How about another extreme thing? skydiving? Bungeejumping? No way! I can't imagine doingB that.