Dad would lean the over the seat and backhand someone, maybe me, the oldest.
The back seat occupants would stop their battles over seat territory and would get real quiet and calm for a long, long time. Peace would erupt in the back seat.
Hey, I survived.
LOL, I remember one time my mom was trying to backhand my brother next to me in the back seat, and he cagily kept his face just out of reach of her extended arm.
She jammed on the brakes, he lurched forward into her offensive zone where she could reach him, and she smacked him!