I was walking my dogs at the park last night,which is in the middle of 4 streets,one very busy.I see this car pull up in the dark but cant see anything,all of a sudden he takes off at a slow medium speed with a dog running behind the car

I wasnt sure if he stopped to let the dog out or pulled over because of the dog on the road??? Anyway he eventually drives past where i am and i shine my big heavy duty torch at the dog who is still running behind the car and at the guy who is driving.He drives down to the end of the street and turn around,he stopped infront of me and i asked is that your dog,to which he replied yes,i asked what he was doing and he rudely said whats it look like,i am walking me dog! I was just gobsmacked! He then drove off with dog running behind car. This lazy sod couldnt be bothered walking his dog so made him run behind the car! I dread to think what would have happened had a maniac driver come flying down the road,the dog would have had no chance,he wasnt on the foot path,he was everywhere,weaving from footpath to footpath.
Has anyone ever seen someone do this before? I havnt!
Kate