I doubt very seriously that your dad scared them off I think it's much more likely they decided the car wasn't worth a murder beef.
Thanks, but then I do not remember seeing you there that day.
The car was a 2 year old 1964 Chevy Impala 2 door hardtop, very popular at that time.
But then again you did not know my Dad.
A neighbor was the all Military light heavyweight boxing Champion, a SGT in the Army. He taught his kids to be tough, a neighbor boy whipped both of them. The Champion caught the kid in the corner of our yard while he was playing with my little Bro.
Little bro ran in the house and yelled at Dad, they are beating my buddy. Dad ran outside and I followed. The Champ was holding the kid telling his sons to punch him in the face. Dad grabbed the champ by the shoulder and spun him around, Dad then pushed him hard all the way out of our yard, Dad did mention he was not a kid and if the champ wanted a piece have at it. The champ never raised a hand. Coulda been the look in Dad's eyes.
When I was about 5 or 6 we were down town coming out of a restaurant, the City Marshall had a young Army boy on weekend leave down and was punching him in the face repeatedly.
Dad ran over and grabbed the 6' 5" Marshall and spun him off the young soldier. The Marshall spun as if to fight, he stopped, I'll never forget Dad called the Marshall by first name and said either let him go or arrest him do not touch him again. The Marshall walked off. Later in life I asked Dad about this. This is when Dad started opening up about his military service. Dad ended up being an MP after washing out of flight school due to being color blind. Their MP company went to North Africa and was there day one. Their company was thrown in with the rest as a fighting company. The MP company ended up getting all the dangerous jobs, recon, recon with jeeps and going after snipers. The City Marshall and he were in the same company. The big boy would push smaller fellow MP's around and kick their tail if they didn't like it. He pretty well thought he was the boss until he pushed my Dad. One fella got his tail handed to him on a platter and it was not my Dad.
At some point the MP company was given a troopship full of ex Nazi and Italian soldiers to bring back from North Africa to a POW camp in the US. Constantly outnumbered by POW's he did OK.
Like I said Dad had a look with body language that might make a believer of one.