I have done some stupid things which nearly killed me; the first at age 10 and the last, I hope, at age 70. You may note that this is a long span of years to commit near suicidal follies. Doing such things as a child or even as a young man may be seen as natural, naturally stupid perhaps, but persisting in such activities well into the years of reason, reflection and maturity may indicate a surprising lack of those ripening fruits of age and experience.I...