Re: Stuff you like to believe happened in Nolan's series
Batman had just been shot wearing a suit that is susceptible to knives and gun fire. I don't think he had time to strategize a non lethal way to stop Dent. I think he acted at the last second out of desperation to save a child.
"Sometimes I remember it one way. Sometimes another. If I'm going to have a past, I prefer it to be multiple choice!"
- The Joker