It was an 80's or 90's bank robbing film starring a guy and a teenage boy. At the end bad guys were chasing them and the boy was hanging off the end of the truck by a wire that he had gotten entangled in. Please someone help me.

Fast Getaway (1991) (http://www.imdb.com/title/tt0101857/), maybe?
It's about father/son bank robbers, and there's a scene where the son is dragged behind a truck on a wire fence.