Inventor Franz Reichelt wants to test his novel "parachute suit" from as tall a structure as possible - and the Eiffel Tower seems ideal. Previous trial runs used a mannequin strapped to the chute and have not ended well. Despite this, his plan is to make the Eiffel Tower jump himself. Can he be persuaded to see sense?

Self-experimentation - particularly in the field of medicine - has a long and checkered history. Can we learn anything useful from such unorthodox experiments, or are they reckless acts of egotism and hubris? 

For a full list of sources go to timharford.com.