I would call going down into the car to save the kid, repeatedly working with the kid to get him to come out, and just generally holding the car up with all of his newfound strength to be heroic. The main thing though is that the act was selfless. If he were selfish, he would have instead either ignored them or went after the Lizard. As Ben says in the movie, when you have the power to do great things, it becomes your responsibility to do them. You take yourself out of the equation, and use your gifts to help others, not something self serving or aggrandizing. In that moment, Peter had to take his personal issues aside and help someone, simply because he is able and they are not. I know that people like the with great power comes great responsibility, but I really like Uncle Ben's version of that in the movie.