Yes indeed ordinary people have done many extraordinary things in this world, the one i remember the most is Shaheed Matbar Singh Negi who sacrificed his life while defending the Indian Parliament from terrorists attack on 13th December, 2001!!
Your vote on this answer has already been received
Yes a japanese jumped into the chimney of an American Warship and destroyed it all when it was heading towards Japan and saved his country in a big way. and pppl at QNA would be able to influence the national opinion some day...I wish.. ;)