One of my favorite movies is Kick Ass, about an ordinary adolescent who wants to do good. He fabricates a costume, broaching the safety of his bedroom (where fantasies run rife) to fight crime where he finds it.
In this film, our hero doesn't have superpowers. He can't cling to the sides of buildings or destroy his opponents with superhuman prowess. His only "super power" is his desire for justice. His own ass is kicked many times over by run of the mill thugs before he encounters his nemesis, and rises to the occasion (quite literally, because, come on, if you don't have super powers you totally need the latest in technology). Right (with technological might) prevails and the world is safer for it.