Does the most heroic act have to be a real life act or a fictional one from the movies or TV etc? Obviously the fictional ones will appear to be more heroic and dramatic like blowing up a deathstar without using the targetting computer and only having a 2 metre hole to aim for. Whereas the everyday life ones might be a complete stranger diving into a freezing cold water on a stormy night in winter with the winds blowing massive waves around to swim out and save the life of a stranded teenager when the firemen on scene said it was too dangeous to do so, and in doing so ended up in hospital themselves oo.
I know the person who was saved so this act meant a lot to me because years later this person was an important part of my life.