parachuting at 70

I was on IM with a friend form Europe, and she said that running the marathon at 41 is not that crazy – after all, there are 70-year-olds who learn parachute-jumping. (She conceded though that not having ever exercised might be a problem.) I felt disappointed. I wanted her to say it was a bold, wild, outrageous idea with little chances to be transposed into fact, and that I would do it anyhow.