"It was an accident," Lt. Karen Anderson said.
The man was in the car with his wife and daughter when the incident took place. After he pulled over to check on the man he hit, the bikers surrounded the SUV and began hitting it and spiking the tires, police said.
The driver then attempted to escape, hitting three more bikers in the process and unraveling a 5-minute-long chase that ended with the driver having to pull over due to tire damage. At this point, the gang -- known as "Hollywood Stuntz" according to police -- cornered the man and beat him.
He was treated at a local hospital for injuries including slashes to his face and released. His wife and child were not injured.
One of the bikers struck by the car, 28-year-old Christopher Cruz, was arrested and faces several charges, including reckless endangerment, reckless driving and endangering the welfare of a child, police said.
Fifteen bikers were arrested after Sunday's incident. Police also seized 55 bikes and wrote 68 summons in relation to the episode.
Authorities have not yet unveiled the identity of the man driving the SUV. They're currently trying to determine if any more charges should be filed based on a video of the incident that was recorded in a helmet camera one of the bikers was wearing.
Since the incident, the video has been posted on YouTube and gone viral.