A maniac repeatedly whacked a 68-year-old man in the head with a Razor scooter during a Brooklyn clash this week, police said.
The senior got into an argument with a much-younger stranger around 9:30 p.m. Wednesday on Lincoln Place near Utica Avenue in Crown Heights when the brute suddenly grabbed the kick scooter and bashed him with it multiple times, authorities said.
It was not immediately clear what sparked the clash, or whether the scooter belonged to the suspect…