Let's say a boy and his mother are in their front yard playing baseball. Mom is pitching to the boy and the boy is really whacking some of the baseballs pretty hard. Then let's say a teenage kid drives up and parks directly in front of the house/yard not 10 feet from where the mother and son are playing. Then lets say one of the baseballs gets whacked right into the window of the car that was placed there in the middle of the practice session. Who would be responsible for the damage? 

