What happens in a car accident in NJ, when the other driver tells you to "just go"?

-Today i was involved in a very minor fender bender, and the other guy said just go and we parted ways. Is there any thing to follow=== what follows is you fix your car and he fixes his car and your insurance company does not need to know that you were in this accident...... the other guy does not have any insurance and does not want to stick around and go to jail .... fix your very minor bent fender and forget it ....