This is another advise on your admission essays writing. A heroism subject is something I want to share my thoughts with you on. It is ok that everyone wants to be a bit of hero. If you really behaved like a hero – go ahead and be one even in your admission essay. But when you just speak about how good you are, and how happy the college should be if they get you on the board – it is taken different by the committee, and I am afraid they wont make a positive decision on your application. Speak more about how you could be successful after the college graduation, bring value to the people and society. It will work better for you, believe me.
Good luck with your admission process!