J-man: I've considered it. Main problem is my brother lives 2,000 miles away in Colo, don't see him too often.
I'd also be a little fearful ( now) since I have a surgically repaired ankle, and wouldn't want to risk damaging it. I would have done it before the ankle. I'd ride the space shuttle , for sure. The opportunity never really came about.
My brother is 8 years older than me ( he's 48 ). His philosophy is take more risks as you age, less to lose ( time-wise).