A man involved in a group of bikers' alleged assault of a driver in Manhattan suffered spine injuries in the confrontation and is paralysed, his wife has said.
The incident in which police say the bikers assaulted the driver of a Range Rover in front of his wife and child has been caught on video.
Police have so far arrested two suspects, both from the bikers' group.
The video, taken from a rider's helmet cam, shows a large group of bikers clustering around the Range Rover in Manhattan.
There is an initial collision, then the bikers chase down the car, which at various points is blocked in traffic or surrounded by the riders.
At one point, the SUV suddenly accelerates, bouncing over at least one of the motorcycles and its rider as others scramble to get out of the way.
The chase ends when the SUV exits the highway and gets stuck in street traffic.
The video shows one biker using his helmet to smash the driver's window, another one trying to smash the window with his fists.
Police said the group then pulled the man from the SUV and beat him, although that part is not shown on the recording posted online.
The biker who may never walk again, Ed Mieses, is the one hit by the car as it sped away, his wife Dayana said.
He suffered broken legs, fractured ribs and spine injuries, according to his family.
Mr Mieses, known as Jay Meezee, is an aspiring rapper from outside Boston, and he and his wife have two teenaged children.
Sky.
No matter how intimidating they were I don't think I could have driven away like that, but you never know what you would do until faced with such a situation.