This has been all over the news, in New York a group of motorcycle riders boxed in an SUV to stop it.  The driver of the SUV panicked by being boxed in and took off, when he took off he hit a couple of the riders causing some serious injurys. 

The group of motorcycles took off and chased down the SUV again and began beating the driver and the  vehicle.  The driver was with his wife and two year old child.