I always wonder to myself "Could I die doing this?", and if the answer is "Yes, it's possible", then I tend not to get involved. Sky Diving, parachuting, bungee jumping, hot air balloons and helicopters - they're all out of bounds. Okay, I appreciate I could die walking down the street, or driving on the motorway, and I dare say one day I will actually do one or more of the above, but at the moment, none of them seem particularly sensible occupations. And don't get me on scaling super tall structures, and dangling from them with no harness....