Donating one of your kidneys to save someone else, and then contracting some debilitating disease that make you lose your one remaining kidney, and being unable (for some reason) to accept a donation, is tragic. Not this.
Regards,
The example described by you is mega-horrendously sad and tragic. The taco mans example is sad and tragic cause it underscores the common(not all) human tendency to think that nothing can go wrong in all we do. Bathtub falls and death is a very common example.
Freegards also.