What should you do if you bumped into a parked car and drove away?

This should make you ashamed of yourself, this was just a mistake right up until you decided you would not take responsibility for your actions.

Well first off, that is illegal. If you hit a car and drive away, that is the same as hitting a person and driving away and is called a hit and run. You could be charged a hefty fine and could spend up to 2 days in jail, depending on your local and state laws.