I stumbled across this article examining the risks of various extreme sports from a statistical viewpoint on the BBC Future webpage. It makes makes brief, interesting reading… and I was particularly attentive as I enjoy several activities that are mentioned. Bottom line: BASE jumping and high-altitude mountaineering are a fairly effective way from dispatching yourself from this mortal coil (pun intended), whereas sky- and SCUBA-diving are fairly equally safe. Of course, this analysis doesn’t assess the potential physical and mental health benefits to be gained from spending lots of time getting exercise in the fresh air (or water!). For a wider discussion, see the preceeding piece on micromorts as a measurement tool.