New York ? A bizarre Manhattan serial hit-and-run case took a turn Thursday, with midtown pedestrians again paying the price.

Two days after crashing his sedan into 19 people along a 20-block stretch, authorities said, Ronald Popadich pulled a carjacking at a New Jersey mall, then returned to the scene of Tuesday’s first hit-run crime, crashing into seven people in a midtown crosswalk.

Just as he had Tuesday, authorities said, Popadich left the mayhem behind by fleeing into the subway.

About 90 minutes after abandoning the carjacked Volkswagen Jetta in Manhattan, Popadich was arrested at his mother’s home in Garfield, N.J., not far from where a woman police believe he shot was found critically wounded Sunday.

Police said Popadich admitted that he deliberately crashed into his victims on both days.

On Wednesday, Popadich, 39, crashed into three people crossing Seventh Avenue at 34th Street. He then made a U-turn and slammed into four more pedestrians on the other side of Seventh before speeding away, police said.

Popadich drove another block and then, bleeding from the nose, pushed through a crowd before ducking into the subway, investigators said.

Left in the a car was a .32-caliber, six-shot Smith & Wesson handgun police believe Popadich used to shoot Lisa Gotkin, 40. She was shot twice.

While police in riot gear and bloodhounds searched the midtown area, Popadich later told authorities, he jumped into a taxi and made the 15-mile trip to his mother’s home.

Neighbors said that Popadich’s mother, Violet Popadich, then called Bergen County Police and told them her son had returned.