One thing only? Darn, I have a laundry list. Seriously, I am one of those fearful people who worries about everything out in the world. I would change that about myself.
ride the ferris wheel, Pat? Ah, no, what if the tech had a fight with his girlfriend and didn't fix the brakes properly.
surgery? No, what if the anesthesiologist had a bad night and pushes the wrong meds.
let's go for a ride. No thanks, what if we get in an accident.
Okay these are exaggerations but you get my drift. I would love to be an adventurer and travel and see all kinds of wonderful things...but ohhhh it.s scary out there.