I confess that when I think of all this acceptance of risk to do fun stuff all sorts of things come to mind, like Christopher Reeve.
Although I don't know the details of his incident it would seem to me that riding a horse at a reasonable pace,while wearing a helmet,might be a low risk venture.If his injury was a fluke,rather than one that could easily have been predicted,then one can chaulk it up to bad luck.Riding a bike at 70mph,OTOH,must be considered a medium risk activity and driving *any* automobile at 139mph on I-95 must be considered an act of attempted suicide.I didn't read the article in full but it just occurred to me...what might a full toxicology screening of that clown have turned up at the time he was stopped?